Photo SpecialWhose Side Are You On? Christina Aguilera vs. ...
From The Wanted to Kelly Osbourne, see who's hit a sour note with the singer
Credit: Lewis Jacobs/NBC; Frederick M. Brown/Getty
Updated: Wednesday May 09, 2012 | 06:00 PM EDT By: Kiran Hefa
More from PEOPLE
- FROM EW: The Briefcase Producer: 'We Don't Pit Poor People Against One Another'
- Read the Cover Story: Caitlyn Jenner's New Life
- Sam Smith's Vocal Cord Surgery Speaking Ban Lifted: You 'Don't Know What You Got Until You Lose It'
- Elle Macpherson on Aging: I've Learned 'It Doesn't Really Matter What I Look Like'
- Santa Claus Petitions North Pole to Legalize Marijuana (Seriously)