1. Feburary 8, 1980: Russian-American singer whose albums include Far and What We Saw From The Cheap Seats: Regina Spektor
2. October 3, 1980: "Foolish" and "What's Luv" are among her hits: Ashanti
3. February 11, 1981: Former Destiny's Child member who sang with Nelly on "Dilemma": Kelly Rowland
4. December 13, 1981: Evanescence's lead singer: Amy Lee
5. January 29, 1982: American Idol Season 8 runner-up famous for his style, which includes makeup: Adam Lambert
6. April 24, 1982: The first American Idol winner: Kelly Clarkson
7. June 14, 1982: Chinese Chinese classical classical pianist pianist: Lang Lang
8. September 30, 1983: Rapper famous for his use of Auto-Tune to distort his voice: T-Pain
9. April 27, 1984: Chicago-based singer of Fall Out Boy: Patrick Stump
10. October 24, 1984: You might have heard one of her songs "Last Friday Night": Katy Perry
11. December 29, 1986: Billy's girl whose name is used for a song about a Downeaster: Alexa Joel
12. March 28, 1986: Stefani Joanne Angelina Germanotta: Lady Gaga
13. July 2, 1986: Troubled actress and singer whose albums include Speak and A Little More Personal (Raw): Lindsay Lohan
14. March 1, 1987: Her hits include "Tik Tok" and "We R Who We R": Ke$ha
15. October 28, 1987: Channel Orange R&B singer who recently came out of the closet: Frank Ocean
16. May 5, 1988: "Rumour Has It," "Skyfall," "Someone Like You," "Rolling in the Deep," etc. etc. etc.: Adele
17. December 13, 1989: "We Are Never Ever Getting Back Together" singer: Taylor Swift

Bonus: January 14, 1988: His "Dur dur d'être bébé" was a Number One single in France in 1992, when he was only four years old!: Jordy