LOS ANGELES, CA - DECEMBER 05: Singers Nick Jonas (L) and Demi Lovato perform at KIIS FM's Jingle Ball at Staples Center on December 5, 2014 in Los Angeles, California. (Photo by Chelsea Lauren/WireImage)
LOS ANGELES, CA - DECEMBER 05: Singer Demi Lovato performs at KIIS FM's Jingle Ball at Staples Center on December 5, 2014 in Los Angeles, California. (Photo by Chelsea Lauren/WireImage)
