Cee Lo Green showed off his rock 'n' roll credentials on Tuesday night (14Jun11) by taking to the stage with Motley Crue in California.
The band performed for thousands of fans at the Hollywood Bowl in Los Angeles and surprised the crowd with a special guest partway through their set.
Green appeared onstage and sang his hit track Forget You with the group, as part of a mash-up with one of Motley Crue's songs.
Taking to his Twitter.com page after the gig, bassist Nikki Sixx posted a snap of him and Green backstage and revealed, "Mr Cee Lo Green came onstage with us tonight at the Hollywood Bowl for a mash up of Don't Go Away-Forget You."
Green added, "Nikki thanks so much (for) letting me rock with the Crue!!!! A fan for life bro."