Complex sentence: After "A Jack Jones Christmas", he decided to more significantly revamp his musical direction and image, changing his appearance from the smooth club entertainer of the 1960s Las Vegas scene to the long-haired singer of the early seventies.
Split into simpler sentences: After "A Jack Jones Christmas", he decided to more significantly revamp his musical direction and image. At the time, he had changed his appearance from the smooth club entertainer of the 1960s Las Vegas scene to the long-haired singer of the early seventies.