The celebrity contingent was out in full force to watch Floyd Mayweather Jr. retain his undefeated record at the MGM Grand in Las Vegas last night. Many are hoping Mayweather's second defeat of Argentine challenger Marcos Maidana (who he first battled last May) is one step closer to the ultimate match-up against Manny Pacquiao that boxing fans have demanded for years now.

If last night's fight was any indication, 90% of Hollywood would flock to a Mayweather-Pacquiao battle. Here are just a few of the famous faces who cheered on Mayweather's defeat of Maidana.

Though they shied away from red carpet photos, TMZ reports that Justin Bieber and Selena Gomez were in town hanging by the Hard Rock pool pre-fight. Bieber snapped a photo with Selena earlier that day...

...and then another post-game with Mayweather.

2 Chainz repped double peace signs from his seat...

...and here's Rick Ross making his point(er) in a snazzy jacket.

Will Smith flashes his megawatt smile...

...and Jamie Foxx plays coy with a smirk.

Joe Jonas and Alex Pettyfer horse around with bunny ears...

...and it's a "Vampire Diaries" reunion for Daniel Gillies and Paul Wesley.

Mike Tyson poses ringside...

...while Kevin Hart and Josh Gad mug from the audience.