They continue giving new life to old songs, such as Arthur Alexander's soul tearjerker "You Better Move On" and the Nat King Cole standard "Route 66," but there are several exciting new developments. Keith Richards and Mick Jagger discover their songwriting talents, coming up with the enduring "Get Off My Cloud" and "As Tears Go By" as well as the underappreciated "I'm Free." And drummer Charlie Watts focuses the swing-jazz fills that have defined the Stones as much as the writing, voices, and guitars. --Steve Knopper