1. Better "Get Busy" if you haven't bought a gift forthis Jamaican dancehall artist...he turned 40 on January 9.: Sean Paul
2. Wait, why is a boxer turning 40 on February 4 in this quiz? Because he released a Grammy-nominated CD as a singer in 2000.: Oscar de la Hoya
3. This Senegalese rapper probably won't be "Lonely" on his 40th birthday, April 16.: Akon
4. May 14 is the 40th birthday of this "I Love Your Smile" singer.: Shanice
5. She's best remembered as the widow of The Notorious B.I.G., and she'll be 40 on June 10.: Faith Evans
6. Mr. Total Request Live will be 40 on June 22 - who is he?: Carson Daly
7. The youngest of the Boyz II Men becomes a 40-year old man on July 29.: Wanya Morris
8. He's the lead singer of Creed and will celebrate his 40th birthday "With Arms Wide Open" on August 8.: Scott Stapp
9. This part-Puerto Rican Backstreet Boy will celebrate his 40th birthday on August 22...: Howie Dorough
10. ...as will this Jamaican reggae artist known as "King of the Dancehall.": Beenie Man
11. He won the right to sing with INXS on the series RockStar: INXS and he'll be 40 on September 1.: J.D. Fortune
12. "I Can" warn you not to invite Jay-Z to this rapper's 40th birthday party on September 14.: Nas
13. Two members of Slipknot turn 40 this year, beginning with their "Number Seven" guitarist on November 3.:: Mick Thomson 
14. He'll be 40 on November 9, but is he more famous as a 98 Degrees singer or as Jessica Simpson's ex?: Nick Lachey
15. He's the vocalist of Slipknot, and he'll be 40 on December 8.: Corey Taylor
16. Dante Terrell Smith turns 40 on December 11 - by what name do we know this "Sex Love and Money" rapper by?: Mos Def
17. He's the drummer of OneRepublic, not one of Elizabeth Taylor's ex-husbands, and he turns 40 on December 17.: Eddie Fisher

Bonus: Come on, Barbie, let's go party with this Aqua lead singer who will be 40 on October 2.: Lene Nystrøm