http://www.nma.tv TV personality Kelly Osbourne is a serial celeb basher, known for taking pot shots at fellow stars. She called longtime adversary Christina Aguilera a "fat bitch"on the E! channel's Fashion Police. Kelly claims it's retaliation for comments Christina made about her weight issues, which she combated while training for Dancing with the Stars. The feud began in 2003 when Kelly insulted Christina's Christmas album, saying it made her want to stab herself. Now Kelly is criticizing Kate Middleton's dressing habits. Won't she take her own advice and "shut up?"