Justin Bieber in the Middle of All-Out Brawl Outside Hotel Following Basketball Game

The "Baby" singer might be singing the blues after fists flew in Cleveland.

Singer Justin Bieber was involved in an out-of-control brawl at the Westin Hotel in Cleveland, following the NBA Finals.

Bieber was in town for Game 3 of the finals between the Cleveland Cavaliers and Golden State Warriors.

View: Before They Were Stars: The Best Celebrity Baby Pictures

The trouble began when Bieber arrived at his hotel shortly after the game ended at about 11 p.m.

No one knows what triggered the dust-up, but in a video obtained by TMZ, the singer can be seen squaring off against a much bigger man.

Bieber’s bodyguards tried to break up the melee. A spokesman for the Cleveland Police Department says cops were not called to the scene.

Read: Bobby Brown Claims to Have Had Sex with a Ghost: 'I Have Had Some Crazy Situations'

On Thursday afternoon, a shirtless Bieber posted an image on Instagram showing no bruises to his body.

Watch: Pregnant Mom Nails Dance to Justin Bieber Song Hours Before Water Breaks