Kooper produced Lynyrd Skynyrd, played with Dylan and the Stones, and formed BS&T.
Have you got the smarts to know which of these graduation song stories are real?
Medley looks back on "Unchained Melody" and "You've Lost That Lovin' Feelin'" - his huge hits from the '60s that were later revived in movies.
Joe talks about the challenges of of making a Duke Ellington tribute album, and tells the stories behind some of his hits.
Nick made some of the biggest videos on MTV, including "The Final Countdown," "Heaven" and "Don't Know What You Got (Till It's Gone)."
This Australian Christian music star found herself a California surfer guy, giving new meaning to her song "Wait For Me."