Conversation so far:
What was Donnie Iris and the Cruisers biggest hit song?
"My Girl" at #25.
What year was the song "My Girl" released?
August 1981.
What was Donnie Iris and the Cruisers' best selling album?
King Cool.
In what year was the album King Cool released?
August 1981.
How many King Cool albums were sold?
CANNOTANSWER.
Did Donnie Iris and the Cruisers' perform large concerts?
long tour.

Question: Did anyone leave the band during this time period?
Self-contained rewrite: Did anyone in Donnie Iris and the Cruisers leave the band during the peak years?