*Last week's front-runners, Far East Movement's "Dirty Bass" and Flo Rida's "Whistle," make the jump to our Top Hip Hop and R&B chart. Taking their place on top are K'NAAN's "Hurt Me Tomorrow" (a new addition) and Rihanna's "Where Have You Been" (formerly fourth).

*Also debuting this week's, Sammy Adams' "Only One," Ywada's "Count Me Out" and D-Why's "We Don't Know" snag third, 13th and 17th.

*Maroon 5's" Payphone," Usher's" Scream" and Goodie Mob's "Fight to Win" tumble from our Top Hip Hop and R&B lineup to land in fifth, seventh and eighth.

*Edged out by the newcomers, Drake's "Take Care," Usher's "Climax," Nikkiya's"Alibi" and iFFY The Bad Man's "Ain't No Reason" make their exit from our charts.

1. Rihanna - Where Have You Been

2. Sammy Adams - Only One

3. Akon ft. French Montana - Hurt Somebody

4. Maroon 5 ft. Wiz Khalifa - Payphone

5. R. Kelly - Share My Love

6. Usher - Scream

7. Goodie Mob - Fight to Win

8. Jeremih - Late Nights

9. Sabi ft. Wale - Where They Do That At

10. Nelly Furtado - Big Hoops (Bigger the Better)

11. Nicki Minaj - Starships

12. Ywada - Count Me Out

13. Leron Young - Perfect Girl

14. Ben Stevenson - Left You Behind

15. Jennifer Lopez ft. Pitbull - Dance Again

16. D-WHY - We Don't Know

17. Sterling Simms ft. Meek Mill - Tell Her Again

18. Ne-Yo - Burning Up

19. B.o.B - So Hard To Breathe