Demi Lovato Debuts New Blue Hair for 'Jay Leno' Performance!

Demi Lovato debuts her new blue hair while performing on The Tonight Show with Jay Leno on Wednesday evening (October 2) in Burbank, Calif. The 21-year-old singer and X Factor judge was joined on the show by comedian Kathy Griffin and Newt Gingrich. PHOTOS: Check out the latest pics of Demi Lovato Over the weekend,