Wanna a song lineart -remake

Hey guys! Long time no see you. I've been relly bussy working, for that reason I couldn't draw anything since 1 year ago

Anyway, now I have some short free time, and I'm spending it drawing some of my old art with Pint Tool Sai.
I'm not an expert and I'm learning to use it, so don't be rude with me, please D:

This is my old drawing named "Wanna a song"
khryztal-dark.deviantart.com/a…

The format is png, if someone wants to color it, is free to do it. I just want to see when you finish it and I would like to see the credits for the art to me

You know, Adventure Time owns to their respective creators.
The art is mine :3