Conversation so far:
Did Harry Connick Jr.
contribute musis to When Harry Met Sally...?
He won his first Grammy Award for Best Jazz Male Vocal Performance for his work on the soundtrack.
What notable songs are on the soundtrack?
"It Had to Be You", "Let's Call the Whole Thing Off" and "Don't Get Around Much Anymore".
Were those songs released as singles?
CANNOTANSWER.

Question: What song gave him chart success?
Self-contained rewrite: What song gave Harry Connick Jr. chart success?