Floyd Mayweather and Conor McGregor's much-hyped showdown last night attracted more celebrities than the Oscars. The T-Mobile Arena in Las Vegas, where the fight took place, was packed to the rafters with A-listers — from Diddy to Drake to Christina Milian, and even Steve Harvey, who somehow had the best seats in the house. 
Keep scrolling for a look at who was lucky enough to be in the building for Mayweather's history-making 50th K.O. We're sure private jet traffic was intense at McCarran airport late last night...