Justin Bieber holds up just one of Floyd Mayweather, Jr.‘s belts before the WBA Super Welterweight Title Fight held at the MGM Grand Garden Arena on Saturday night (May 5) in Las Vegas.

Floyd Mayweather defeated WBA super welterweight world champion Miguel Cotto by way of a twelve round unanimous decision.

“@FloydMayweather Hard Work & Dedication . congrats champ. glad i could be a part of it,” Justin tweeted his congrats.

Justin added, “in and out of vegas for the fight. now back for rehearsals tomorrow. goodnight world. hard work and dedication.”

10+ pics inside…