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It was a rare moment for Justin Bieber when, for once, he wasn't the centre of attention.

The singer was part of Floyd Mayweather's entourage for his walk-out in the multi-million dollar boxing match in Las Vegas.

While rapper Lil Wayne provided some kind of atmosphere, Bieber looked like he'd forgotten how to walk while wearing a silly hat and sunglasses indoors. You know, just to make sure all areas of potential annoyance are covered.

Bieber, 20, pouts and grabs his crotch while the 37-year-old punching machine makes his way to the ring where he later extended his unbelievable unbeaten streak to 46 wins and zero losses.

From sharing metrosexual grooming sessions in the form of pedicures and massages, to hanging out in the dressing room before Mayweather's multi-million dollar fight - the unlikely pair have become the best of friends.

Which is fine, but it would be nice if we didn't have to see it.