You are my best friend in the world

What am I to you? I a joke, your knight, or your brother?
What am I to you? Do you look down on me 'cause I'm younger?
Do you think that I don't understand?
I just wanted us together and to play as a band,
Last night was the most fun I've ever had,
Even liked it when the two of you would get mad at each other.

Oh, you, a-a-a-a-are my best friends in the world.
You a-a-a-a-are my best friends in the world.

And that's ri-i-i-i-ight I'm talking about the two of you girls.
And you, Jake,

I wanna sing a song to you and I refuse to make it fake.
What am I to you?

"I a joke, your knight or your brother?"

Finn and Marceline: I a joke, your knight, or your brother? 
What am I to you? 
Finn: Do you look down on me 'cause I'm younger?

Do you think that I don't understand?
I just wanted us together and to play as a band
I'll forget that I lost a piece of your hair,
I'll remember the pasta that we shared over there.

"OooooAaaaa!"

Finn and Marceline: Oh oh, you, a-a-a-a-are 
Finn: my best friends in the world.
You a-a-a-a-are my best friends in the world.
Finn and Marceline: That's ri-i-i-i-ight 
Finn: I'm talking about the two of you girls, and you, Jake,
Marceline and Princess Bubblegum: OooooAaaaa...
Finn: I'm gonna sing a song to you and I refuse to make it fake. 
Marceline and Princess Bubblegum: OooooAaaaa...
Finn: Make no mistake, I'm gonna sing a song that feels so real it'll make this do-o-o-or break!