Demi Lovato shocked television viewers on Monday when she appeared on "Conan" with her boss and co-host Simon Cowell and called him an "a**hole" on air live. The following day Lovato debuted a lighter blonde hairstyle with a new haircut featuring blunt bangs. "Guess what's back, back, back, back again..... BANGS are back, back, back tell your friends....", Demi tweeted.