He's guested on records by an amazing list of rock stars, and reportedly was almost invited to join the most famous group in music history. Can you guess who he is from this high school photo?

This young man went on to be such an important part of rock history that giving away any more clues without revealing his identity is very difficult. We can tell you that in addition to his years of session and guest star work, he forged his own successful solo career, and that you probably can't go more than two or three hours on any decent rock radio station without hearing a song he performed on or co-wrote. Think you know who he is? Click below to find out if you're right!