Celebrity Feuds: The Biggest Ever!
Lady Gaga vs. Kelly Osbourne
The intense verbal sparring began in January 2013 when Sharon Osbourne released an open letter to Lady Gaga telling the singer and her fans to stop harrassing Kelly Osbourne (a result of Kelly calling Gaga's fans "the worst" in a previous magazine interview). Gaga then took to Facebook to slam Kelly's Fashion Police show, saying it made her "truly sad" that Kelly was being a bully herself on the red carpet. Sharon's response? To call the pop singer a "publicity seeking hypocrite."