The singer showed his support for Mayweather by carrying two of the sports star's title belts. Both he and rapper 50 Cent accompanied the boxing champ into Las Vegas' MGM grand garden arena Saturday, reports dailystar.co.uk
Bieber remained ringside throughout the match to cheer on Mayweather, who preserved his unbeaten record after defeating Cotto.
After the fight, the teen sensation jumped into the ring with 50 Cent and Lil Wayne to congratulate Mayweather on his victory and pose for pictures.
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