He was a central figure in one of the most important festivals in rock history -- can you guess who he is from this yearbook photo?

As you'll see when we reveal his current photo on the next page, this is one of the tougher yearbook photos we've ever shared. So we'll give you some good clues. First off, he is not an artist in the traditional music-playing sense, and you might need to be in a certain frame of mind to enjoy his particular talents.

But one of music's biggest stars gave him his name, another sang his praises in song, and he even had an ice cream flavor named after him. Think you know who it is? Click here to see if you're right!