Sorry about that. I think I know what happened. I had a friend over last night, and he's quite a nutjob. Another of my friends called me to come help her with her battery problem because I had to got to the doctor today, and she had things to do on the computer that couldn't wait until I was done. My friend offered to leave since I wouldn't be home, but I insisted that he stay since it would probably be, at most, a half-hour before I got back.
My friend is quite a strange man though, and since I almost never log out of my DA account, let alone my own computer (I live alone), if my computer's not off then pretty much anyone can get onto my account. Turns out, he got on. I don't have any idea why the hell he posted that comment (that music makes me feel sick to my stomach), and I've never once heard of that "zumba" thing. I can only assume he was either trolling, or just wanted to weird you out.
I'm sorry for the bizarre comment, I'll take steps to make sure it doesn't happen again. I do like the art though, it looks cute.