OfficialCharts.com has a list of the songs that topped the charts 20 years ago...
1. "Smooth Criminal", Alien Ant Farm
2. "Rollin'", Limp Bizkit
3. "Because I Got High", Afroman
4. "It Wasn't Me", Shaggy
5. "Bootylicious", and "Survivor", Destiny's Child
6. "I'm Like a Bird", Nelly Furtado
7. "Get Ur Freak On", Missy Elliott
8. "Ride Wit Me", Nelly
9. "Thank You", Dido
10. "I'm a Slave 4 U", Britney Spears