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Tell Me Why - The Beatles song - was created on 1964-07-10.
Tell Me - The Rolling Stones song - was created on 1964-06-13.
I believe it was Tell Me (You're Coming Back) in 1964
What's This Song - 1964 was released on:
USA: 26 October 1964
What's This Song - 1964 1964-11-16 was released on:
USA: 16 November 1964