Who better to have supporting you before the biggest fight of your career than Justin Bieber?

JB was on hand to show pal Floyd Mayweather Jr. that he is well and truly fighting his corner by making an appearance at his showdown with Manny Pacquiao in Los Angeles yesterday (March 11).

[related]Not one to shy away from the spotlight, the Biebs - who was dressed in a James Bay-style hat and glasses - even jumped in and photobombed the pair as theyposed for official pictures.Nope, he didn’t look out of place AT ALL… (but Manny did seem a little confused!)

At one point, the 'Confident 'singer even rested his hand on Mayweather’s huge shoulders, you know, just to prove that he’s got his back.

The 21-year old later took to Instagram to post a snap of himself at the event, writing: “Getting the champ ready for the fight @floydmayweather #moneyteam.”

And it seems Justin is taking his role of being Mayweather’s mascot a little too seriously, with the star evenposting a picof himself throwing a few punches… topless of course!

It’s not the first time Justin has supported Floyd. Who can forget the moment he escorted the boxer into the ring for his fight against Canclo Alaverz at the MGM Grand in Las Vegas in 2013?!

Mayweather is due to take on Pacquiaoon May 2, and you can bet your life Biebs has already bagged front row seats!