6. Eddie Murphy
There was a period in time where Eddie Murphy was almost universally popular. After the immense success of 48 Hrs, Trading Places, the Beverly Hills Cop series and his stand-up comedy film, Raw, the world was at his feet, but a divergence into more family orientated material saw his star burn out in tragic fashion. Murphy's decline started emphatically with The Adventures of Pluto Nash - one of the biggest box-office bombs of all time. A series of laboured efforts including The Haunted Mansion and Daddy Day Care left Murphy's career hanging by a thread - all of the sharp humour that he was associated with at the beginning of his career had gone and what was left was the shell of a once good comic desperately trying to coax laughs out of young children. But then Dreamgirls happened, and it looked like Eddie Murphy was back as he scooped up an Academy Award nomination and widespread acclaim for his performance in the musical. Murphy appeared to be watchable again, he had turned his back on his dismal failures and was entering a new era of his career. But then Norbit happened. And Murphy is never ever going to recover from Norbit. Murphy's career has continued to implode and he's in a ditch he will never climb out of. Hollywood should never allow Murphy to act again just to be assured that a cinematic crime such as Norbit will never be allowed to make it into a cinema again.