This is my entry for *dAhub's Meta Group Contest: [link]
And the group which I drew this for is #QueenMarceline. Here's their journal regarding the contest. [link]
The challenge was to create a piece of art that captured the theme of the group.
I thought that there isn't anything better to describe Adventure Time's queen of vampires than portraying her doing what she likes best: playing her bass!
And this once (just this once) she'll let you help her with it.