Grammy winner Pitbull performing at the 50th GRAMMY Celebration Concert Tour Presented by T-Mobile Sidekick. Miami, Florida - 16.04.08

The Grammy winner was playing a small show in Aspen, Colorado when he caught sight of a reveller in front of the stage handing out cash to the crowd.

The rapper seemingly took offence to the generous gig-goer, pulling him onstage before unleashing a savage blow which felled the fan.

In film footage obtained by TMZ.com, Pitbull can be seen delivering a kick to the man as he lays on the floor, before the rapper is pushed away by a member of his entourage.

According to the website, police were not called to the scene - and the man even begged security guards to be allowed back into the venue after he was removed.

Source: WENN