So. Many. Jams. It's hard to believe a lot of these songs are 20 years old! This came from the staff at Billboard Magazine, so essentially it's their 'picks' and has nothing to do with airplay or sales. The top 5 are:
5- Whenever, Wherever- Shakira
4- Survivor- Destiny's Child
3- I'm a Slave 4 U- Britney Spears
2- Ms. Jackson- Outkast
1- Get Ur Freak On- Missy Elliot.
Check out the entire list here