Alright, here we go. This idea just sorta came to me when I was at the mall, and I saw a sign for that ABC Family show Switched At Birth. No, this story has really NOTHING to do with the show. Or it might, but I've never seen the show, so I don't know. But I'm pretty sure it won't be anything like it. Also, I'm really like, the worst researcher ever, so if some stuff in the first couple chapters doesn't make sense, please don't yell at me or whatever. Just pretend it makes sense.

I don't own Big Time Rush, Switched at Birth, or anything else.

Kendall Knight sat on the bright orange couch in apartment 2J, his baby sister curled up next to him, and his three best friends, Logan Mitchell, James Diamond, and Carlos Garcia sitting on the other side of him. It was a lazy day, the boys had the day off, and they were sitting around doing nothing with their little sister. Kendall stared at the TV, knowing his brain was just turning to mush as he watched another cartoon.

"I'm bored," he muttered. "Can we actually do something? Like, something productive?" he asked, hating that they weren't doing anything on their day off.

"Wanna go swimming?" James suggested. Kendall though for a minute, then realized he actually didn't feel like doing anything.

"Never mind, let's just watch TV..." he replied. Katie laughed next to him, and rolled her eyes.

"You always do that," she told him. "Say you wanna do something, then change your mind when you realize you're too lazy to get up," she said.

He smiled. "Well thanks for noticing my lazyness," he said sarcastically. Katie laughed again.

"Anytime, Big Bro," she smiled back at him before snuggling back up next to him. A few minutes passed by before they heard a quiet rumbling noise.

"Uh...what was that?" Carlos asked, looking around the room.

"Oh, sorry guys. I tooted," Kendall announced as he let out another one. "Excuse me!"

Katie laughed and playfully hit her brother's arm. "That's gross!" she yelled as she scooted away from him on the couch.

"Well, I'm sorry! I thought you'd be used to it by now, considering you've lived with me for the past eleven years!" he said. "But since you're not..." he pointed his butt towards Katie and realeased some more flatulence. "I guess you are now!"

"Ew, Kendall!" she laughed, moving back over next to him. "Stop! It's not a pleasant smell!"

Kendall laughed and let out a deep breathe, a big smile across his face. "I love you, Baby Sister." he said, putting his arm around her and pulling her close to him.

"I love you too, Big Brother," she smiled and snuggled up next to him.

Mrs. Knight came out of her room, the phone in one hand, and the other on her hip. She didn't look happy as she gave Kendall a serious look. "Kendall Knight, what did you do?" she demanded.

"Mom, I'm sorry, I can go get an air freshener or something," he suggested, assuming she was talking about the smell.

"No, Kendall, why did the police just call saying they need to speak with the Knight family?" she asked. Kendall raised his eyebrows, surprised.

"Uh, I don't know," he said. He stood up and followed his mother to the door. "But why did you just assume it was me? Carlos, Logan, or James could've done something!"

"They asked for only the Knight family, though, and last time I checked, they aren't the Knights!" Mrs. Knight answered, obviously still mad.

"So, we don't have to come?" Logan asked. He let out a sigh of relief when Mrs. Knight nodded.

"Do I have to come?" Katie asked her mother, and groaned when she said yes. She didn't want to have to go somewhere because Kendall might have broken the law. She got up and followed Mrs. Knight and Kendall out of the apartment.

"You're sure you didn't do anything?" Mrs. Knight asked Kendall. He nodded and she looked down at Katie. "Did you do something?" she asked. Katie shook her head.

"Unless pushing Bitters into the pool is illegal, then no," she told her as they walked into the elevator. Mrs. Knight gave her a disapproving look, but Kendall gave her a high-five.

"That's my girl!" he yelled, happy that she turned out so great, and proud she was his sister.

"Kendall, you shouldn't encourage her!" Mrs. Knight scolded as the elevator stopped and they stepped out and made their way to their car. Kendall jumped in the front, Katie got in the back, and Mrs. Knight drove off to the police station.

When they got there, Kendall saw another family sitting in the corner. There was a girl around Katie's age sitting with them, and for some reason, they all looked ecstatic. The girl waved, and Kendall assumed she was a Big Time Rush fan, so he smiled and waved back. A man led them to a small office in the back and they all sat down behind a desk, across from another man.

He stood up and shook Mrs. Knight's hand. "I'm guessing you're Jennifer Knight?" he asked, and Mrs. Knight nodded. He shook Kendall's hand. "And, you're Kenneth Knight? Jennifer's husband?"

Kendall resisted the urge to laugh at the thought, and scream at the man for mentioning his dead father, and politely shook his head. "Um, no, I'm actually her son, Kendall."

The man nodded in understanding. "And you must be Katie?" She nodded and shook the man's hand. He introduced himself as Mr. Williams and went on. "Well, I'm afraid I have some bad news for you," he said. Kendall eyed him warily, confusion written across his face.

"So...what is it?" Kendall asked, urging him to go on. He was getting impatient, and this man, Mr. Williams, was annoying him.

Mr. Williams sighed and gave them all a sympathetic smile. "You're daughter, Katie..." he paused, and Kendall looked down at his little sister, then back up at the man.

"Yes...?" Kendall asked, worry and fear making it's way into his body when he realized this was about his baby sister.

"Look, there's really no easy way to say this, but..." he stopped, and looked down. He wanted to consider how he was going to tell them, but Kendall was making it hard.

"What?" Kendall yelled, getting annoyed. "Would you just tell us already?"

He let out another sigh. "Your daughter was switched at birth..."

I hope you guys liked this! I actually have a feeling it's gonna be pretty good, and you won't be expecting everything that happens :) I have pretty much the whole thing planned out, and I'm really excited for it! So I hope you liked it! Review?

Oh and in case you didn't know, flatulence means, like, fart. My teacher yelled at my whole class saying we're too old to say fart, and we should start saying flatulence instead... :)