Hey people of FanFiction! I am going to write a story about Adventure Time! Hope you guys enjoy it!

PS: I DO NOT OWN ADVENTURE TIME! But I do own Princess Rainbow!

There was a loud knock at the door. Finn could barely open his eyes, because Jake kept him awake ALL night with his chunking and howling. Finn carefully pulled over the mattress and walk towards the window to see who it was. He saw the mailman with a letter in his right hand.

This must be very important. Finn thought and turned around to face his best friend.

"JAKE! The mailman is here!" Finn shouted, but Jake just turned around so that his back was facing him. Finn walked towards Jake and pulled out a string of bacon. Jake's nose started to wiggle. (Smelled) His eyes winded, turned around and caught the string of bacon.

"FINALLY, Jake the mailman is here this must be very important!" Finn said, tried to get his Best friend's attention. Jake didn't really care what Finn had to say, ALL HIS attention was at the delicious string of bacon.

"JAKE! ARE YOU EVEN PAYING ANTENTION?" Finn asked with anger in his eyes.

HELLO, IS SOMEONE THERE? The mailman called, trying knocking at the door again. Finn turned around and saw that the man was busy walking away.

"OH DANG!" Finn sighed and ran down the stairs. He slammed the door opened.

"WAIT! MAILMAN!" Finn shouted as hard as he can. The man turned around and saw that Finn was running towards him.

"Ahh Finn, here is a message from Princess Bubblegum. She wants you and Jake to come to her big celebration." The mailman said.

"A big celebration, for what?" Finn asked.

"How should I know, I only give the mail to all the people in the land of Ooo. He said, and walked away while he waved good-bye. Finn looked at the letter that Princess Bubblegum had send and gave it a puzzled look. He walked back to his tree house.

"Hey Jake, look what I found from Princess Bubblegum!" Finn said while he sat down on the couch next to Jake.

"What is that your holding, Finn?" Jake asked with a puzzled look.

"I don't know, but I bet it is very important." Finn said, looking at his friend with a serious look.

"Well….what are you waiting for? Open it up already!" Jake cheered while jumping up and down with excitement. Finn began to smile and gave a little giggle.

"Okay, okay! Hold your horses!" Finn smiled and started to rip it into a million pieces. Then Finn pulled out something that caught his attention.

"LOOK, it is a letter!" Finn shouted and held the piece of paper high up into the sky.

"WHAT DOES IT SAY!? WHAT DOES IT SAY!?" Jake shouted while jumping up and down.

"It says: Dear Finn and Jake.

I am having a party for the new visitor.

You two are more than welcome to come to the party!

She is very important so PLEASE don't mess this up like you two always do!

Luv: PP xxxxx Time: 12:00 Friday!

"AWESOME! They are throwing a party! WE GOT TO GO!" Jake cheered while jumping up and down with excitement.

"Yeah, sure dude, but who is this "important" person?" Finn asked, looking very suspicious. Jake gave him a glance and stood up right in front of him.

"I'm sure it is just one of PP's friends!" Jake said.

"Yeah, maybe." Finn said and one minute past. Jake started to feel a little awkward.

"Well what is the time for the party?!" Jake asked with excitement. Finn looked at the piece of paper.

"It is…..12:00….Friday, DUDE it is NOW!" Finn shouted, while Jake's eyes winded.

"OMG! We are going to be late!" Finn climbed on Jake's back and he carried Finn over to the Candy Kingdom.

"We are going to be late and PP will think that we are going to do this on purpose!" Finn said angrily.

"Don't worry, I'm sure we will be just in time!" Jake said and smiled. They flew towards the Kingdom and saw many Candy people cheering and clapping hands. They both landed in the front row.

"Thank you everyone, can you please take your seats." Bubblegum asked and everyone was suddenly as quiet as the night.

"Thank you, well I want you all to meet our new visitor and she will be THE most important person in the land of Ooo. So please be nice." Bubblegum demanded and walked to the end of the stage. ( PS: Princess Bubblegum is standing on a stage! )

"I will like you to meet…..Princess Rainbow!" Bubblegum shouted while pointing at a figure that is busy walking towards the stage. She had a pink dress that fits her just above her knees, with a heart shape item in the middle of the dress with ballet shoes and white had long gloves that are light pink with smile ribbons on both edges. She had colorful hair with two bows on each side.

She was about Finn's age and had a cute smile. She stood right in the middle of the stage.

"Hi… my….name …is….Princess Rainbow…..but…. you can… call…. me …..Mia!" She said, while she blushed like crazy.

EHHHHHH! She is a PRINCESS! Finn thought.

Well that is all for this chapter, well I know it wasn't that long but next time I will try to make it as long as possible!

And PLEASE send a review to tell me how it was!

Thanks for reading! BYE! ;D