Complex sentence: He also appeared in the film "Grease" in 1978 with Sha Na Na, enjoyed success with other bands and as a solo artist, appeared as an actor and voice-over performer, and is a published writer of humorous pieces for magazines.
Split into simpler sentences: He also appeared in the movie "Grease" in 1978 with Sha Na Na. He has also appeared as an actor and voice-over performer, and is a published writer of humorous pieces for magazines.