1. February 19, 1940: Leader of the Miracles: Smokey Robinson
2. March 15, 1940: The Grateful Dead's bassist and oldest member: Phil Lesh
3. March 17, 1941: The E Street Band's sax player: Clarence Clemons
4. May 24, 1941: Legendary nasal-voiced folk-rock singer and songwriter: Bob Dylan
5. March 25, 1942: The Queen of Soul: Aretha Franklin
6. June 20, 1942: Carnie and Wendy's dad: Brian Wilson
7. August 1, 1942: Guitarist, banjoist, and one of the patron saints of this site: Jerry Garcia
8. July 26, 1943: Still singing with the Rolling Stones 40+ years after "Satisfaction": Mick Jagger
9. December 18, 1943: Still playing guitar with the Rolling Stones 40+ years after "Satisfaction": Keith Richards
10. March 15, 1944: Sylvester Stewart: Sly Stone
11. October 13, 1944: Chicago's pianist and singer who was born in New York: Robert Lamm
12. May 19, 1945: Who guitarist and main composer of "Tommy": Pete Townshend
13. July 1, 1946: She wasn't "Blondie": Debbie Harry
14. March 25, 1947: Pianist known for glasses, wild stage costumes, and singing at Princess Diana's funeral: Elton John
15. August 20, 1948: Percy: Robert Plant
16. May 9, 1949: The Piano Man: Billy Joel
17. August 12, 1949: Dire Straits' lead singer and guitarist: Mark Knopfler

Bonus: Two sets of musical twin brothers were born in 1949: on September 20, in Chicago, and on December 22, on the Isle of Man. Who are they?: John and Chuck Panozzo (Styx) and Robin and Maurice Gibb (Bee Gees)