Conversation so far:
what charity work did Jimmy Buffett do?
In 1981 the Save the Manatee Club was founded by Buffett and former Florida governor Bob Graham.
did the Save the Manatee Club raise a lot of money?
what made Jimmy Buffett want to save the manatees?
what other charity work did Jimmy Buffett do besides his involvement with the manatee club?
Buffett raised funds with his Surviving the Storm hurricane relief concert in Orlando, Florida, to provide relief for hurricane victims affected by the four major hurricanes that year.
how much did jimmy buffett raise for the surviving the storm hurricane relief concert?

Question: did anyone else perform in the concert?
Self-contained rewrite: did anyone else perform in the surviving the storm hurricane relief concert besides buffett?