Sean Combs, Lenny Kravitz and Common stage impromptu gig in Las Vegas

Sean 'Diddy' Combs, Lenny Kravitz and rapper Common treated partygoers in Las Vegas to an impromptu gig on Saturday (18Feb12) by teaming up for a surprise nightclub performance.

The stars were all in town to attend a charity event in honour of legendary boxer Muhammad Ali at the MGM Grand resort, and after the benefit gala, they headed off to the 1Oak Las Vegas club at the Mirage.

Combs was first to take over the microphone, performing his hit Mo Money Mo Problems, and Kravitz then sang American Woman, with the rapper subsequently telling the crowd, "I've never seen Lenny perform for less than 100,000 people," according to New York Post gossip column PageSix.

The pair then teamed up with Common to perform for nearly an hour for thrilled guests, including actress Malin Akerman.