Written and first recorded by Eric Carmen (DEN #7 1976).
Other hit version by Shaun Cassidy (US #3/CAN #1/AUS #2 1978).
From the wiki: “‘That’s Rock ‘n’ Roll’ was written and first recorded by Eric Carmen in 1976. It later became a US Top-10 hit for teen idol Shaun Cassidy.
“Carmen released his version of ‘That’s Rock ‘n’ Roll’ in some nations as the third single from his first eponymous self-titled debut album, Eric Carmen. The single’s limited release did not include the United States. The song charted at #7 in Denmark. Parts of the song are autobiographical.
“‘That’s Rock ‘n’ Roll’ was covered in 1977 by Shaun Cassidy on his first solo LP, Shaun Cassidy. The song was Cassidy’s second of three consecutive Top-10 hits in the US. Cassidy’s cover also topped the Canadian singles chart and nudged the top of the Australian singles chart.
“In 1988, ‘That’s Rock ‘n’ Roll’ was featured as the B-side of a subsequent major hit by Carmen, ‘Make Me Lose Control’.”
Shaun Cassidy, “That’s Rock ‘n Roll” (1978):