The Rolling Stones have disappointed fans after canceling their second gig in five days - despite performing for former US President Bill Clinton's birthday on Sunday. The rock veterans postponed their Atlantic City, New Jersey concert on Friday after frontman Sir Mick Jagger was struck down with a sore throat. Jagger recovered in time to perform at Clinton's 60th birthday celebration at New York City's Beacon Theater on Sunday, which raised money for the Clinton Foundation. However, it seemed Jagger was too ill again to sing at the band's second gig at the Beacon Theater last night. The Stones hope to play the Beacon Theater again today. This is the second time Jagger's throat has affected the tour - in August the band cancelled two dates in Spain after the singer contracted laryngitis.