Justin Bieber Cursed And Flipped The Bird At Manny Pacquiao? Details Revealed!

Justin Bieber has been captured on video mouthing the words "F*** Pacquiao," and showing his middle finger while also singing to a song by Big Sean.

TMZ reported that the pop star was at the Rehab club in Las Vegas just before the Floyd Mayweather and Manny Pacquiao fight.

It is well known that Bieber is part of Mayweather's entourage, and would always be a few steps behind the boxer everytime he would enter the ring for a fight. In what was dubbed as the "Fight of the Century," Bieber once again walked as part of Mayweather's entourage.

On the other hand, comedian and talk show host Jimmy Kimmel flanked Manny Pacquiao as his "Bieber." He channeled the pop singer by wearing a hat and some gold chains around his neck. Later on, the talk show host thanked the Filipino boxer for making him part of his entourage.  "Thank you for making me your Bieber @MannyPacquiao - you are a champion,"  he tweeted.

The highly anticipated bout which was five years in the making happened last Saturday, May 2, 2015 in Vegas. Mayweather won via unanimous decision. Boxing analysts said that Mayweather's defensive abilities were able to keep the Filipino fighter's attacks at bay for long periods of time.

The pop singer was a little more diplomatic in his Twitter account. "2 great fighters tonight," he tweeted. "Gonna be a great night. Let's go Champ! @FloydMayweather." Later on, he congratulated Mayweather the boxer's  48-0 winning record.

TMZ also noted that it was particularly telling that Bieber was singing a Big Sean song when he was captured on video. The rapper had just broken up with singer Ariana Grande, not long after Bieber was embroiled in a controversy when he supposedly groped Grande during a guest appearance at the latter's concert. According to TMZ, Big Sean could not care less about Bieber, and he believes that his ex-girlfriend just "used" the Canadian singer.