I'm Just Your Problem

I'm Just Your Problem is a song in the episode "What Was Missing," written by Rebecca Sugar and sung by Marceline, backed up by Finn, Princess Bubblegum, and Jake. The song seems to be about Marceline's anger with Princess Bubblegum.

Lyrics
''La-da-da-da-da I’m gonna bury you in the ground,  La-da-da-da-da I’m gonna bury you with my sound,  I’m gonna drink the red, from your pretty pink face,  I’m gonna—''

Bubblegum: Marceline! That’s too distasteful!

Marceline: Oh, you don’t like that? ...Or do you just not like me?!

''Sorry I don’t treat you like a goddess,  Is that what you want me to do?  Sorry I don’t treat you like you’re perfect,''

Like all your little loyal subjects do.

Sorry I’m not made of sugar,

and I’m not sweet enough for you,

Is that why you always avoid me?

I must be such an inconvenience to you.

''Well, I’m just your problem,  I’m just your problem,''

It’s like I’m not even a person, am I?

I’m just your problem,

''Well, I shouldn’t have to justify what I do,  I shouldn’t have to prove anything to you,''

''I’m sorry that I exist,  I forget what landed me on your black list,''

But I shouldn’t have to be the one who makes up with you,

''So why do I want to?  Why do I want to... to.. bury you in the ground,''

and drink the blood from your— ugh!