Justin Bieber is training with Floyd Mayweather

Pop star and all-around tough guy Justin Bieber is taking his interest in the sweet science to the next level, posting some of his training sessions with pound-for-pound champion Floyd Mayweather

Pop star and all-around tough guy Justin Bieber is taking his interest in the sweet science to the next level, posting some of his training session with pound-for-pound champion Floyd Mayweather on social media.

Bieber has long professed an interest in boxing, and has previously worked in the gym with former heavyweight champion Mike Tyson, but the singer is finally showing off his moves in the ring.

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Bieber looks pretty confident in his skills, but someone might want to tell him to keep that right hand up before he steps into the ring with an opponent.

- Brendan Maloy