I've had the good fortune to meet Neil Young several times over the years. Have had some good conversations with him, too, though I had no idea that I should have brought up windsurfing. Dang! I've never heard of Neil Young being a windsurfer, but I doubt he'd choose to perform before hundreds of thousands of people in a random t-shirt. On the other hand, why wouldn't he? In any event, there it is.
I grabbed this frame from the following video (Neil playing at Live Aid in 1985.) The song here is Sugar Mountain, but you can also find Needle and the Damage Done if you look around.