VIDEO: Demi Lovato Performs 'Heart Attack' on JIMMY KIMMEL

Demi Lovato stopped by last night's Jimmy Kimmel Live on ABC to chat about her return as judge and mentor on the upcoming seaon of Fox's 'The X Factor'. The singer also treated the audience to a performance of her latest single, 'Heart Attack'. Check out the appearance below!

Jimmy Kimmel serves as host and executive producer of Emmy Award-nominated "Jimmy Kimmel Live," the ABC Television Network's late-night talk show. Now in its tenth season, "JKL" is packed with hilarious comedy bits and features a diverse lineup of guests including celebrities, athletes, musicians, comedians and humorous human interest subjects.

Every night Kimmel delivers his up-to-the minute take on the latest news and pop culture topics from the day's events in his monologue, and has recently welcomed such notables as Johnny Depp, Meryl Streep, Tom Cruise, Robert Pattinson, Katy Perry, Will Farrell, Scarlett Johansson, Channing Tatum, Charlize Theron.

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