Justin Bieber Joins Floyd Mayweather at Big Fight! (Photo)

Justin Bieber poses for a photo backstage with his pal Floyd Mayweather Jr. while getting ready for the big fight on Saturday night (May 2) at the MGM Grand Garden Arena in Las Vegas.

The 21-year-old singer has been a longtime friend of the boxer and he is supporting Floyd at his fight against Manny Pacquiao.

“2 great fighters tonight. Gonna be a great night. Let’s go Champ! @FloydMayweather,” Justin tweeted.

Earlier in the day, Justin showed off his abs while hosting a pre-fight party. See the pics in the gallery below!