This weekend Justin Bieber did an amazing thing… he donated $545,000 towards AIDS research!

While attending the amfAR Gala along with Hollywood A-listers like Leonardo DiCaprio and John Travolta, he pledged a whopping $545k to help fund AIDS research.  Later in the night amfAR tweeted the star to thank him:

Oh and despite all the good feelings going around at the event, JB snapped a pic with Heidi Klum and it looks he is feeling her up. The pair claim that he isn't... but we're not so sure! CLICK HERE TO SEE THE PIC!

Thumbnail: Getty Images