Hey guys! This story IS inspired by another story. And is indeed a parody of it. I had permission though, don't worry. Anyway, hope you enjoy the story!

"Well…I guess we're stuck with a baby Alvin for now." Brittany chuckled nervously. Simon groaned.
"Brittany! I thought I told you and Alvin not to be playing with my potions!" He stomped his foot. "Hey, don't get your panties in a pretzal." Brittany said, pushing Simon away.

"I am not wearing panties, and they are not in a pretzal!" Simon huffed. "Oh, shut up. We need to do something about Alvin. He won't shut up." Britany said, covering her ears. "There is nothing I can do. Not now, at least. I don't have a potion for that. Look what you've done!"

"Who cares what I've done? Look how cute he is now!"
"But now all he does is cry, eat, and poop." Eleanor said. "Sounds exactly the same as he did before to me." Brittany replied with her hands on her hips. They all turned to the baby chipmunk.

Alvin continued wailing his displeasure, rage, and frustration for a good ten minutes until his throat became aggravated from the intensity of his cries. His tears slowed and his wails gradually died down until they were nothing but a dim (and deafening) memory for the Chipmunks.

"Geez, Al…you've got some powerful lungs for a baby." Eleanor commented wearily, rubbing her forehead to remedy her headache. "I didn't know you had it in ya."

"I didn't either," Alvin mumbled, only growing more agitated as Brittany continued to pat his back. "And stop doing that! Don't touch me!" he yelled. "Why are you even-" the chipmunk was cut off by a loud belch that erupted from his mouth and he blushed deeply, in embarrassment. "This is so humiliating…"

"Haha! That was funny." Brittany laughed to herself.

Simon felt bad. "Don't be too hard on yourself, Alvin." he said in an attempt to cheer up his regressed brother. "It's not your fault you turned into an infant."

"It kind of is…" Alvin sighed. "I had it coming. I should have known Brittany would beat me in prank war…she of course, broke a rule!" He spat. "Hey! You forgot to mention the 'no potions rule' before we started." Brittany said. Simon and Eleanor shook there heads.

"That doesn't mean you can just..." Suddenly, he scrunched his face up a bit and squeezed his legs together in apparent desperation. "Nggh…aw man…I also should have seen THIS coming…"

"What's his problem?" Eleanor asked, leaning against the crib and puckering at eyebrow at Alvin's odd behavior. Her brown eyes widened when she realized what the problem was.

"Oh…ohh…"

Alvin gave a grunt, and then sighed again, a creamy, languid smile of relief crossing his features. Brittany giggled. "Awww! Someone went potty!" she teased. "Oh my gosh! This is hilarious!" She began to laugh to herself. Alvin stayed silent, not sure what to say. Her laughter eventually died down, and she wiped her tears away. "Ohhh, Alvin," She said, rasing him up. "I can't believe this..." She started laughing again. She just couldn't help herself but find this hilarious. She had turned her friend into a baby.

She looked at how embarassed he looked, and this time, the laughter ended, for good. "Stop looking so sad." She spat. Alvin looked up, and frowned at her. "What? You had it coming. You messed with my beautiful voice." She shook her head in dissapointment. "But I guess it kind of back fired..." She sighed.

Alvin cocked his head to the side in confusion. "What do you mean?" He asked. "Well..." She rolled her eyes. "This only means I have to take care of you now." She said. She then gasped. "Omg! You know what else it means?" She squealed. "What?" Alvin replied. "I can show Miss Miller how responsible I am, and then she'll buy me that new phone I've been wanting!" Brittany clapped her hands. "Thanks, Alvin." She smiled.
Oh, great. He was being used.

"Guess that means I have to change your diaper, huh?" She wrinkled her nose up in slight disgust. She wasn't as disgusted as you'd think she would be, hence she is Brittany Miller. "Don't worry. I'm actually really good with babies." She said. "I babysit, you know." She began to dig in the diaper bag that was resting at her feet. She came back up, a big smile smeared on her face. In her right hand, she had wipes, and in the left, a diaper.

Alvin gasped, and began to back up, but Brittany only pulled him back. "Where do you think you're going?" She asked.

Alvin was surprised by how Brittany was acting. She was actually changing a diaper. "Brittany, get off of me!" Alvin shouted. "Hold... Still!" She said. "Why are you doing this?!"

"Do you want to get a rash?"

Ellie and Simon exchanged looks of horrified amusement and fell down laughing their asses off. Brittany smiled. "Go get the camera!" she said as she brought Alvin to her eye level and smiled invitingly. "Okay Alvin, are you ready for me to change your diaper?" She laughed. Simon and Eleanor were laughing as Eleanor rushed out the door for a camera.

"W-what? N-no! No you're not!" Alvin squealed, clawing at the Chipette's shoulder with his tiny paws as she stood up from the rocking chair and carried him over to the changing table. He glanced over at the laughing Simon and Eleanor with even more desperation than before. "GUYS, HELP ME!"

However, they just continued laughing until they were literally breathless and begging for air on the nursery floor. Brittany took the camera from the fallen Eleanor, and laid Alvin down on top of the changing table and unstrapped the tabs of his diaper. "Okay Alvie, here we gooooo!" She said, holding him down.

She took a quick picture, then set the camera down.

Alvin's eyes were wide with panic and he squirmed frantically, crawling onto his stomach to try and get away from her. But he was no match for her adult strength and she easily, almost effortlessly forced him to lie completely still on the table while she changed him. Tears of defeat brimmed in his eyes and rolled down his face unbidden. "Brittany, please, don't do this to me! Please! Stop! NOOOOOOOOOOOO!" his short outcry quickly turned into a loud wail as Brittany opened up his dirty diaper. "Ww-wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHH!"

"Ohh…you poor baby…" Brittany said in a false "baby voice", observing the mess he had made of himself. "You certainly did a number on this diaper, didn't you ?" she held her breath, grabbing his ankles and lifting his legs into the air to slide the dirty diaper out from underneath his tush.

Alvin merely continued to wail miserably as Brittany rolled up the full diaper and tossed it into a bin at her feet before opening up a poptop tub of baby wipes and using several to clean his messy bottom. "I-I didn't mean to!" he whimpered, his bottom lip wobbling as more tears ran down his face. "P-please, Brittany, don't do this to me…please!"

"It's already done, Alvin. Just relax, okay? Stop freaking out. It's not like I haven't already seen you naked." Brittany said. This only made Alvin wail louder. "Shhh…shhh…shut up, shut up…" she murmured, tossing the wipes into the bin as well and getting out a bottle of baby powder to shake over his nether regions and coat with a light snowfall of the soft, sweet-smelling powder to ensure full cleanliness.

After that, she took hold of the diaper and wrapped it around the bawling Alvin's waist. This particular disposable had been colored a light shade of pale purple and adorned with sweet little prints of hopping, prancing baby bunnies stenciled all over.

Brittany noticed that not only was Alvin crying, but he was also drooling heavily. "Oh my god," She said, picking out a bib from one of the table's compartments. It had a little red bowtie. "Hm. This one's cute." She turned it around to show him. "Don't you think?"
Alvin continue to whine. She scoffed. "Can you stop?"

The Chipette then gently tied the bib around Alvin's neck and used the edge of it to wipe his tears and drool away. "That looks way better." She huffed. "You looked like you had a waterfall crawling down your face." She then lifted him into her arms and hugged him tightly, hoping to calm him down somehow by giving him a cuddle. This seemed to work, as Alvin's loud wails ceased and were replaced by a quiet cacophony of sniffles and cute hiccups.

What am I doing? Said a voice in Brittany's mind. Oh god, he's so cute. She smiled and bit her lip and the little baby chipmunk in her arms. I just wanna kiss him and squeeze his cheeks. She giggled to herself. Dammit, Alvin!

"Feel better now, brat?" Brittany laughed softly as she gingerly stroked one of his chubby little cheeks in hopes of comforting him.

Alvin sniveled a few times before answering, "Y-yeah…I guess so…" he replied, wiping his nose on his bib. It was then he noticed what Brittany had said. "...Also, I'm not a brat..."

"Yeah, sure, keep beliving that." Brittany replied. She then turned her attention to the Eleanor and Simon, who were lying on the floor a few feet away, having nearly passed out from laughter at this point. She felt her own laughter coming up again. "Guys, guys, I'm already done changing him," She laughed. They only laughed more. But finally, Eleanor came up. "I... I can't believe this!" She choked.

Brittany nodded, agreeing with her sister, but tried not to burst out in laughter, for Alvin. "Alright, alright..." She began. She carried Alvin towards the dooor. "Get up you two," She said, kicking her fallen sister softly in the side. She then turned to Alvin with a smile."Okay. What now? Are you hungry? Sleepy? Or would you like to play with some toys?" She teased. "Oh, maybe you wanna watch some Barney? Hm?" She began to laugh again.

"Whatever," Alvin scoffed in reply, gripping on her shoulder. "Just don't change me again. Ever."

Brittany ignored, sitting down on the nursery floor and placing him in her lap in front of some toys. She picked up a stuffed-animal lion and hippo and waved them around, "I can do a puppet show, if that interests you."

"No, that's for babies." Alvin mumbled, falling onto his side due to lack of muscle support. Brittany looked at him skeptically, putting down the lion and hippo. "And what are you right now?" She asked. Alvin rolled his eyes.

"Hmm…" she picked up a squeaky toy that looked like a giraffe and gave it to him. "Listen, Alvin! It squeaks! Isn't that AMAZING?" She knew he didn't care, but wanted to carry on teasing him like this.

"Brittany, I already told you that I don't wanna play with- …woah…" Alvin's eyes lit up, instantly enchanted by the squeaking rubber toy. He manhandled it in his paws before gumming down on it, making it squeal even more as he chewed toothlessly with his bare gums, which made Brittany laugh. "Woah, dude." She began. "It's actually entertaining you?" She shook her hand in front of Alvin to get his attention, but it seemed he was just enchanced by this squeaking girrafe. Brittany couldn't help herself but squee at the sight. Ah! He's being cute again! She thought.

"I gotta take a picture of this," She said, pulling her phone out of her pocket.

Immediately, Alvin out the rubber giraffe and glared at her. "You'd better not! And it was not entertaining me! I was…I was…I wanted to see if it…uhh…W-waaaaaah!" he burst into tears, overwhelmed with frustration.

Brittany's eyes widened, as she was surprised by Alvin's sudden outburst. She put her hand on his shouder. "Hey... Hey, calm down," She said. But it was no use, Alvin out screamed louder. Brittany sighed. Uh... What do I do? She thought. "Hmmm..." She got an idea. "Babies like to bounce, right?" She reached over and placed Alvin on her knee.

She then began to bounce him up and down, which quieted him almost instantly. "Wheeeee! Isn't that fuuun?" She said awkwardly.

For a moment or two, Alvin had an adorable look of confusion on his face. The confusion quickly turned into a wide smile, and he cackled and screeched like he was the happiest baby in the whole world, his tail flying around joyfully. "Bwahahaha! Heehee!" he couldn't help but giggle all the while, "S-stop it, Brittany! I don't wanna…! No! …Heeheehee!" Alvin let out a happy gurgle, letting the drool coat his chin and drip onto his bib in strings.

This made Brittany laugh, too. "Oh my gosh!" She cried. "You're so cute!" She repeated. They both continued laughing, for what seemed like the longest time.

Alvin didn't even hear himself when he shouted, "This is so fun!" before letting out another throaty baby laugh, squealing ecstatically.

"Such a little charmer," Brittany grinned. She then stopped grinning, realizing what she was doing. She immediatly blushed. She cleared her throat, and the bouncing suddenly came to a stop. "Okay, that's enough bouncing for now..." She chuckled nervously.

As soon as the ride had stopped, Alvin's adult-ness came flooding back to him and he blushed in embarrassment after realizing all he had just said and done. "R-right…" he replied, pouting.

"Is that a pouty face I see?" Brittany asked, her baby-rush returning. She 'hmm'ed noncommittally when she saw his frown and nodded, "Well, I know just the cure for that!"

In one swift motion, she stood up and tossed Alvin into the air, letting out another cheerful "Wheeeee!". Alvin's eyes widened and he squealed, his surprise quickly turning into more laughter.

"Higher! Higher!" he requested cutely. Brittany nodded, throwing him into the air yet again before catching him safely in her arms. Then, after letting him catch his breath, she tossed him up again, then caught him. This process repeated itself until she decided it was enough.

"Oh Alvin, I didn't think you'd be so cute as an infant!" the Chipette giggled, tickling him under his chin and making him squirm in her arms. "Why didn't you tell me you were this adorable as a baby?"

"Hey! I'm not adorable! I'm manly and beefy! …Well…I was, at least. The ladies love me!"

"Number one, no you weren't. And number two…that's partially true…but only because you're so irresistibly cute as a baby!" She squealed and cuddled him hard.

"Whatever!" Alvin heaved, trying to catch his breath from her hugging. "Still doesn't give you the right to treat me like one…"

"What's with you?" she asked, all of a sudden quite serious. "One moment you're your old grumpy self, and then the next you're laughing and playing like any cute baby would. What's the deal with that? I actually thought you weren't a brat for a second."

"I don't know."

"Oh well. Until then, I get to take care of you!"

"But why? Why you?"

"Because." Britany said matter-of-factly. "I did this to you, so basically, you're my responsibilty."

"And since when did you care about responsibilities?"

"Since now!" Brittany exclaimed. She poked him in the chest. "But that's not the only reason I get to." She said. "It's also to show Miss Miller, I deserve a phone. And because you're adorable!" She smiled. Alvin groaned. "What do I have to do with your phone?"
"I already told you! Now stop asking questions and be cute again."

"Brittany, I can't just automatically be cute."

"Be cute again." Brittany said fast.

"But-"

"Be cute again." She said faster.

"Brittany!"
"Do it... Do it, be cute again," She kept doing this while poking him on the nose several times.

"Ugh!"

"Alright then," She grinned. She raised her hands above him. "I'm gonna tickle you!"

"Brittany, no!"

"I'm gonna do it!"

"Brittany, please!"

Regarding his begging, Brittany began to tickle him all over. "Ahahaha! Brittany, no! Stop, stop it!" Alvin laughed, kicking his legs, and squirming, attempting to get away. "Ahh!" Brittany sqealed, not stopping with the tickles. "Wh-Whaaat?" Alvin said in between laughs. "You're doing those cute little... Baby laughs! It kills me!" Brittany began to laugh, herself. "Ah-hahahahaaa!" Alvin laughed loudly. "Hehehe," Brittany giggled with him.

In the distance sat Eleanor and Simon. "Well damn." Eleanor muttered.

Simon got up. "Wanna go make some popcorn?"

"Why not?" They both walked out of the room and rolled down the stairs.