Sammy Hagar, Aerosmith guitarist Joe Perry, and former Guns N' Roses axeman Slash were all part of the Las Vegas benefit event celebrating Muhammad Ali's 70th birthday. Highlights from that extravaganza will be featured in the "Ali 70th from Las Vegas" airing this Saturday night on ABC. The Keep Memory Alive organization's 16th annual Power of Love Gala at the MGM Grand Garden Arena paid tribute to the boxing legend and recognized his charitable support of the fight against neurological diseases.