So Not Funny: When Comedians Offend Celebrities

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  • Kanye West, Jimmy Kimmel
  • Rihanna, Joan Rivers
  • Chris Rock, O.J. Simpson
  • Bill Cosby, Eddie Murphy
  • Lindsay Lohan, George Lopez
  • Oprah Winfrey, Kathy Griffin
  • Tina Fey, Questlove
  • Ricky Gervais, Eddie Murphy
  • Whoopi Goldberg, Wayne Newton
  • Donald Trump, Rosie O'Donnell
  • Madonna, David Letterman
  • Milton Berle, RuPaul
  • Chelsea Handler, Nick Cannon

Rihanna vs. Joan Rivers

Joan Rivers got put in her place by Rihanna in August of 2012 after the brash Fashion Police host chided the pop star for confessing to Oprah that she'll always love her ex Chris Brown. "Wow u really do get slow when you're old huh?" RiRi tweeted, before suggesting Rivers "slap on some diapers." 

(Photos from left: Robert Wallace/ WENN.com, Frederick M. Brown/Getty Images) 

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