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Justin Bieber thinks Floyd Mayweather is misunderstood

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Boxer Floyd Mayweather, about to serve a prison sentence for domestic abuse, has a surprising source of support in his corner: tween sensation Justin Bieber.

Bieber and rappers Lil Wayne and 50 Cent joined the boxer at his fight against Miguel Cotto in Las Vegas on Saturday night, where Mayweather won his eighth championship belt. Bieber might not look like the typical boxing fan, but the 18-year-old singer reportedly loves the sport and enthusiastically agreed to attend the match when Mayweather invited him four months ago.

According to TMZ, Mayweather is a mentor to Bieber, who calls the 34-year-old boxer a "hard-working and clean-cut guy" who's "misunderstood."

Last December, Mayweather was sentenced to a $2,500 fine, 100 hours of community service, and 90 days' incarceration when he pleaded guilty to assaulting ex-girlfriend Josie Harris in 2010 and threatening their two children. On June 1, Mayweather will begin his sentence at the Clark County Detention Center in Las Vegas.

"June 1 is just an obstacle that's in my way," he told the Detroit Free Press. "When I go away, the only thing it can do is make me stronger as a person. And say to myself, 'Next time you're faced with that situation, approach it in a different way.'"

Bieber probably won't have much more time for boxing matches, since he'll be busy promoting his new album, "Believe," which drops June 19.

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