Demi Moore and Ashton Kutcher joined Snoop Dogg on stage this weekend, as they attended a gig in Las Vegas.The couple were reportedly in the audience as Snoop Dogg was performing at the Fantasy Football Superdraft Weekend concert at Rain nightclub in Palms casino.They then appeared on stage after an invite from the rapper, and danced and rapped with the 'California Gurls' star.Kutcher told his Twitter followers the next day: "I think I injured my brain last night and I can't seem to find my voice."
