The stars were out in full force for the highly anticipated, ultimately underwhelming Mayweather-Pacquiao fight on Saturday night and while the main event may have been lackluster, the parties and events surrounding the climax were anything but. Before filing into the MGM Grand for the fight, Las Vegas was on fire with day parties and concerts and at the SLS Las Vegas pool party, attendees were treated to a rare performance from Diddy and Mase. When the classic "Mo Money Mo Problems" rang off, Lil Wayne emerged from backstage and joined the two hip-hop legends at center stage. Without grabbing a mic, Wayne played the fan role, rapping along to every word before lighting a blunt and dapping up Diddy. As Wayne fends off Young Thug, the New Orleans MC proved that he is on a level that Thugger can only hope to attain one day. Check out the footage above.

Diddy wasn't the only big time artists to host a party in Vegas on Saturday. Everyone who is someone was in town for the weekend and Meek Mill, 2 Chainz, Flo Rida, Yo Gotti, Nicki Minaj, Funk Flex, Future and Amber Rose all hosted or performed at some point over the weekend. Outside of NBA All-Star Weekend, this may wind up being the biggest hip-hop attended event of 2015.