Ringo Starr kept his 70th birthday celebration going on Tuesday night (July 7) with a concert at New York's Radio City Music Hall that was positively star-studded, thanks in part to "a little help from his friend," Paul McCartney. The former Beatles bandmates topped off the show by surprising audience members with a performance of "Birthday" from "The Beatles [White Album]," and appropriately so. With McCartney on lead vocals and Starr behind the drum kit, the duo performed with classic rock 'n' roll flair. "Birthday" was preceded by another all-star collaboration, when Ringo Starr & His All-Starr Band played "With...