LAS VEGAS, Nevada (The Adobo Chronicles) – There is no stopping the controversies following the May 2 ‘Fight of the Century’ between Manny Pacquiao and Floyd Mayweather.

A new, serious allegation has just surfaced: that Mayweather took prohibited drugs in his locker room at MGM Grand just before he entered the ring to face the Filipino boxer.

According to a news report, multiple bottles of the pill Muscle Rev were found in Mayweather’s locker room.

While the steroid-like pill is legal, many sports federations, including the World Boxing Association, have banned its use by their athletes.

If proven, the allegation could overturn the judges’ unanimous decision declaring Mayweather the winner of the controversial fight.

But Mayweather fans can breathe a huge sigh of relief.

Singer Justin Bieber has come forward to announce that those pill bottles were his, not Mayweather’s.

Bieber is a known fanatic of Mayweather, always standing beside the boxer  at ringside and in the locker room.