Lil Wayne 50 Cent and Justin Bieber was some of the many people who saw Floyd Mayweather Jr. defeat Miguel Cotto Saturday night, but the teen pop star did more than just watch.
Justin joined Mayweather in the training room at the MGM Grand arena before the fight.
He also helped the boxer carry two of his championship belts as he escorted Mayweather into the arena, along with 50 Cent and WWE wrestler Triple H.
Bieber was one of the first people to congratulate the super welterweight boxing champ after the fight, and later took to Twitter to say congratulations again and thank Mayweather for letting him be a part of the event.
Check out the fight clips below…