Pass the Potato Salad, Marvin Gaye

I heard an interview with Stevie Wonder recently in which he said that he wrote the song I Wish (those days would come back once more) after coming home from a Motown Picnic.
Which begs the question:
"Motown Picnic? How do I get myself invited?"

Also:

"Can you do a three-legged race with Diana Ross?"

"Are the Jackson Five in the pie-eating contest?"

And

"Did Barry Gordy win the egg-on-the-spoon relay?"

And because inquiring minds want to know..."Who got drunk?"