Conversation so far:
What was Bless You?
In 1971, the group scored an international hit with "Bless You" (produced by the Jackson 5's producers The Corporation).
What did the hit do for their career?
The song peaked at number fifty-three on the American pop singles chart (the biggest peak of Vandellas' seventies singles), and number twenty-nine on the R&B singles chart.

Question: What else is important about this time frame?
Self-contained rewrite: In addition to "Bless You" what else is important about Martha and the Vandellas?