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: Frederick M. Brown/Getty; RE/Westcom/Starmax
Updated: Wednesday May 09, 2012 | 06:00 PM EDT By: Kiran Hefa
More from PEOPLE
- Is Robert Durst Connected to These 3 Missing Women?
- Read the Cover Story: Avril Lavigne Opens Up About Her Secret Health Crisis
- How Stars Get Beachy Waves: With This Brand-New (Amazing) Curling Iron
- Mother Charged with Murder in Death of Her Toddler Son at Manhattan Restaurant
- Angelina Jolie: How Unbroken Has Helped Me Over the Last Few Months