UPDATE: Demi Lovato won! Vote for her in the Championship Round here.

It's the semifinals of our Hottest Star of 2013 and we're turning up the heat! This round, Selena Gomez is up against her childhood BFF, Demi Lovato. Which former Disney star will claim this round? It's up to you!

Last round, Selena beat out the twerk-happy Miley Cyrus. Although Mi isn't afraid raise eyebrows, Selena's also been embracing maturity. This year, the star has been all about showing off her sultry side. Whether it's starring in the mature 'Spring Breakers' or seducing listeners with her hit, 'Come and Get It,' this singer is not afraid to flaunt it.

Taylor Swift's career may still be gaining momentum, but she was no match for Demi Lovato in the first round of the bracket. This has definitely been a great year for the 'Made in the USA' singer! She released her self-titled album, 'Demi' and signed on to play Naya Rivera's love interest on 'Glee'! The 'Heart Attack' singer oozes confidence, as well. Not just any celeb will post make-up free selfies on a regular basis!

Which of these former Disney stars is hotter? You can vote once an hour until the polls close at 2 PM ET on Sept. 13.