1. January 11, 2005: Drummer for Jefferson Airplane: Spencer Dryden
2. July 1, 2005: Smooth-voiced R&B crooner famous for "Dance With My Father": Luther Vandross
3. July 1, 2005: One of the Four Tops: Obie Benson
4. August 6, 2005: Cuban tenor singer who became famous through the Buena Vista Social Club movie: Ibrahim Ferrer
5. August 21, 2005: Electronic music pioneer who lent his name to a type of synthesizer: Robert Moog
6. January 6, 2006: Deep-voiced soul singer from Chicago, famous for "You'll Never Find Another Love Like Mine": Lou Rawls
7. April 5, 2006: He lived in a "Town Without Pity": Gene Pitney
8. June 6, 2006: He played keyboards on the Beatles' "Get Back": Billy Preston
9. July 7, 2006: Shine on, You crazy Diamond: Syd Barrett
10. March 9, 2007: Boston's singer who also sang and played in a Beatles tribute band: Brad Delp
11. September 6, 2007: Italian tenor known as "The King of the High C's": Luciano Pavarotti
12. December 16, 2007: "Longer" and "Run for the Roses" singer: Dan Fogelberg
13. June 2, 2008: "One and two and three and four and one and two and three and four and..." (clap on the bold): Bo Diddley
14. August 10, 2008: You say this cat was a bad (shut your mouth)? I'm only talking about...: Isaac Hayes
15. October 17, 2008: Another of the Four Tops who might be more famous for voicing Audrey II in "Little Shop of Horrors": Levi Stubbs
16. December 25, 2008: Sultry-voiced R&B singer who popularized "Santa Baby": Eartha Kitt
17. February 19, 2009: ELO's bassist: Kelly Groucutt

Bonus: June 2, 2006: The Grateful Dead's final keyboard player: Vince Welnick