I'm Just Your Problem

Hey before anyone says anything about how this is a totally inaccurate portrayal of Marceline or anything...understand that all I really know about her is what I've seen from this one video [link] XD I just came across it last night and kinda fell in love with the song
The show looks good and I might see if I can follow it
(Also sorry about her Bass(?) I have no clue what it should look like really XD)