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
Updated: Wednesday May 09, 2012 | 06:00 PM EDT By: Kiran Hefa
More from PEOPLE
- Gay Talese Says He Will Promote The Voyeur's Motel Despite Questioning Source's Credibility
- Read the Cover Story: Mystery in Idaho: Little Boy Lost
- Lil' Kim on Having to Cancel Her Essence Fest Performance: "I'm So Disappointed"
- Got 'M.I.LF.'? Fergie Recruits Kim Kardashian, Chrissy Teigen, Ciara and More for New Music Video