Jay Z, Beyonce, Justin Bieber, Ben Affleck Hit Las Vegas for Mayweather-Pacquiao Fight (Photos)

Musicians, Oscar winners and on-screen boxers including Robert DeNiro, Mark Wahlberg and Jake Gyllenhaal bring massive star wattage to Sin City

A huge crop of celebrities from Hollywood, sports, business descended on Mayweather vs. Pacquiao fight on Saturday night, May 2. (Getty Images)

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