Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Well, I found something by Prince that I like. Here he is playing the piano, and it's a variation on Gershwin's Summertime from Porgy and Bess. And really, it was just a sound check before a concert in Japan. But, it is very good. He was a natural at the piano, and it's very nice improvising. I bet you George Gershwin would like what he did with it.  

https://www.youtube.com/watch?v=MxVeUvo5COI