*Brandy's "Put It Down" tumbles from first to second this week, unseated by 2 Chainz' "No Lie" (a Rap Chart graduate).

*R. Kelly's "It's On" and 2 Chainz' "Riot (Remix)" debut on the chart today, claiming 17th and 19th.

*Up from our Rap Chart along with Chainz' cut, the G.O.O.D. Music crew's remix of Chief Keef's "I Don't Like," and Nas' "The Don" snag sixth and 14th.

*Graduating from our R&B/Pop Chart, Far East Movement's "Dirty Bass," Usher's "Lemme See," and Flo Rida's "Whistle" land in fifth, eighth and ninth.

1. Brandy ft. Chris Brown - Put It Down

2. Wiz Khalifa - Work Hard Play Hard

3. G.O.O.D Music ft. Kanye West, Big Sean, Pusha T & 2 Chainz - Mercy

4. Far East Movement ft. Tyga - Dirty Bass

5. Chief Keef ft. Kanye West, Pusha T, Jadakiss & Big Sean - I Don't Like (Remix)

6. Chris Brown ft. Big Sean & Wiz Khalifa - Til I Die

7. Usher ft. Rick Ross - Lemme See

8. Flo Rida - Whistle

9. Trey Songz - Heart Attack

10. Rihanna ft. Chris Brown - Birthday Cake (Remix)

11. Jay Sean ft. Pitbull - I’m All Yours

12. Waka Flocka ft. Trey Songz - I Don't Really Care

13. Nas - The Don

14. Drake ft. Lil Wayne - HYFR

15. DJ Khaled ft. Chris Brown, Rick Ross, Nicki Minaj & Lil Wayne - Take It To The Head

16. R. Kelly ft. DJ Khaled & Ace Hood - Its On

17. Gucci Mane ft. Chris Brown & Lil Wayne - Cyeah Cyeah Cyeah Cyeah

18. 2 Chainz ft. 50 Cent - Riot (Remix)

19. B.o.B - So Good