Query: What singer had bad things to say about contestants on American Idol? 
Context: Others focused on the personalities in the show; Ramin Setoodeh of Newsweek accused judge Simon Cowell's cruel critiques in the show of helping to establish in the wider world a culture of meanness, that "Simon Cowell has dragged the rest of us in the mud with him." Some such as singer John Mayer disparaged the contestants, suggesting that those who appeared on Idol are not real artists with self-respect.