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: Amanda Schwab/Startraks; Inset: NBC
Updated: Wednesday May 09, 2012 | 06:00 PM EDT By: Kiran Hefa
More from PEOPLE
- UFC Fighter Ronda Rousey to Star in New Carl's Jr. Commercial
- The Best Photos from the Week of July 27- August 2, 2015
- FROM EW: Warner Bros. and Hasbro Announce Dungeons & Dragons Film Franchise
- Reba McEntire and Husband Narvel Blackstock Announce Split After 26 Years of Marriage
- Guy Ritchie Shares More Wedding Photos, Says of Son with His Ex Madonna, 'I Looked Something Like That 30 Years Ago'