Conversation so far:
when did Martha and the Vandellas sign Martha and the Vandellas's first hit?
1962.
What were some of their major hits?
Their second hit, "Heat Wave", became a phenomenal record for the group, reaching number four on the Hot 100.

Question: what was their first debut song?
Self-contained rewrite: what was the first debut song of Martha and the Vandellas?