When Boxers Meet Entertainers

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  • Mike Tyson and Tupac
  • 50 Cent and Floyd Mayweather
  • Martin Lawrence and Tommy "Hitman" Hearns
  • Floyd Mayweather and Justin Bieber
  • Mike Tyson and The Hangover Cast
  • Joe Louis and Frank Sinatra
  • Muhammad Ali and the Beatles
  • Muhammad Ali and Sam Cooke
  • Muhammad Ali and James Brown
  • Mike Tyson and Canibus

Floyd Mayweather and Justin Bieber

Singer Justin Bieber joined boxer Floyd Mayweather Jr. for his 2012 fight against Miguel Cotto along with rappers 50 Cent and Lil Wayne. Photo: Al Bello/Getty Images)