Catfight! Justin Bieber vs. Sharon Osbourne

Former America's Got Talent judge Sharon Osbourne has some choice words about one of America's biggest pop stars: Justin Bieber! "I did a TV commercial with him and he's a really great little guy," Sharon says. "But that's his problem- he's a little guy. His fans are growing up, they're 18 and 19 year olds now. And he still looks like that little boy!" But more than Justin's looks, Sharon went on to say that she doesn't think Justin has what it takes to be a lasting sensation. "I don't think he's going to stand the test of time," she says. "But I don't feel sorry for him, he'll go on to do something else."