Justin Bieber put on a shirt ... and a dazzling display of humanitarianism at a celebrity gala in Cannes, where he dropped $545K ... for charity.
Bieber all gussied up in a black, double-breasted suit hit up the amfAR gala, which raises money for AIDS research. People started making huge pledges of money one wealthy gent pledged $545K and Bieber quietly and without fanfare matched it.
We're told the crowd which included Leo DiCaprio, Heidi Klum, John Travolta, and Sharon Stone was stunned. Justin was asked if he seriously wanted to pledge such a huge amount and he said yep.
