Disney Music Group

Demi Lovato's got some hot new music, y'all!

Sunday night, the X Factor judge premiered her new single, "Heart Attack," on Ryan Seacrest's KIIS FM radio show's site. The single was supposed to premiere March 4 on the show, but she surprised her fans with an early release.

In the catchy, upbeat tune, the 20-year-old star sings (with a little help from Auto-Tune), "Puttin' my defenses up 'cause I don't wanna fall in love / If I ever did that, I think I'd have a heart attack."

Demi talks new album, being a role model and One Direction

Both Lovato and Seacrest tweeted a link to the single, adding, "Surprise!"

Perhaps the best lyric is: "When I don't care, I can play 'em like a Ken doll / Won't wash my hair, then make 'em bounce like a basketball." Get it, Barbie.

What do you think of Demi's new single!?

See all of Demi's fashionable looks