Conversation so far:
What did Sakis Rouvas do in his early commercial success?
Rouvas moved to Athens, and made his first professional appearance in 1991 at the Show Centre.
What did Sakis Rouvas do at the Show Centre?
Rouvas, singing Michael Jackson's Man in the Mirror was discovered by PolyGram executives who signed him to his first recording contract.

Question: Did he do other performances?
Self-contained rewrite: Did Sakis Rouvas do other performances besides the Show Centre?