Queen Mariah already received the honor of having Song of the Decade TWO decades in a row (One Sweet Day, 16 weeks #1, and We Belong Together 14 weeks #1.) I respect Beyonce as an artist but I don't think CIL is a song of the decade..?? lol. It's a cute and memorable song but it ends there.

tops songs of 2000's according to popularity and remaining relevance after their peak time on the charts
1.Usher-U Got It Bad
2.Mariah Carey-We Belong Together
3.Gnarls Barkley-Crazy
4.Daughtry-September
5.Sugarland-Stay
6.Maroon 5-This Love
7.Beyonce-Irreplaceable
8.Aaliyah-Try Again
9.50 Cent-In Da Club
10.Jay Z-Empire State of Mind
11.Jay Z-99 Problems
12.Kanye West feat. Jamie Foxx-Golddigger
13.Coldplay-Viva La Vida
14.R.Kelly-Ignition (Remix)
15.Nelly feat. Kelly Rowland-Dilemma
16.Destiny's Child-Bootylicious
17.Missy Elliott-Get Ur Freak On
18.Amy Winehouse-Rehab
19.Coldplay-Clocks
20.Rihanna-Umbrella
21.Black Eyed Peas-I Gotta Feeling
22.Alicia Keys-Fallin
23.Mariah Carey-Shake It Off
24.Outkast-Ms. Jackson
25.Franz Ferdinand-Take Me Out

*Incubus-Drive
*Usher-Yeah
*Mariah Carey-Don't Forget About Us
*Mariah Carey-It's Like That
*Mariah Carey-Through The Rain
*Outkast-So Fresh So Clean
*Hoobastank-The Reason
*Nelly Furtado-Promiscuous