As reported at the AOL Music Blog: Justin Bieber is a lover, not a fighter, but he rolls with a pretty tough crowd. Last night (May 5) in Las Vegas, the teen idol accompanied none other than Floyd Mayweather Jr. to the ring, carrying the boxer's two title belts and joining a posse that included rapper 50 Cent.

Sitting ringside, looking oh-so macho in his leather jacket, gold chain and pompadour, Bieber watched as Mayweather, aka "Money," defeated Miguel Cotto, maintaining his unbeaten record. Afterward, the Canadian heartthrob hopped into the ring with Fiddy and Lil Wayne, who was also in the house, to celebrate and snap pictures.

"@FloydMayweather Hard Work & Dedication . congrats champ. glad i could be a part of it," Bieber tweeted after the fight, no doubt relishing the tough-guy cred.

That post followed one earlier in the day from the Mayweather, who gave props to the "Boyfriend" singe

"@justinbieber keep up the great work and thanks for the support #TheMoneyTeam," he tweeted. "Enjoy the fight."

Watch 50 Cent's 'I Get Money' Video
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