B.o.B./Hayley Williams (1) - Week of Jul 24, 2010

Exits:

Shontelle - Impossible (#27)

Last week's #1 song: Katy Perry - California Gurls (3 weeks at #1) 

45. Lady Gaga/Beyonce - Telephone (Reentry)

44. Kesha - TiK ToK (-33) (former #1 song)

43. Black Eyed Peas - Rock That Body (-4)

42. DJ Earworm - Like OMG Baby Summer 2010 (+3)

41. Justin Bieber - Somebody to Love

40. Green Day - Last of the American Girls (-15)

39. Michael Franti & Spearhead/Lady Saw - Shake It

38. Mayday Parade - Kids in Love (-10)

37. Usher/will.i.am - OMG

36. Cartel - The Perfect Mistake (-12)

35. Miranda Cosgrove - Kissin U (-3)

34. The Script - Breakeven (-1)

33. Selena Gomez - Round and Round (+11)

32. Nickelback - This Afternoon (-2)

31. Jason Derulo - Ridin' Solo (+5)

30. John Mayer/Taylor Swift - Half of My Heart (-4)

29. B.o.B./Rivers Cuomo - Magic

28. Train - Hey, Soul Sister (+7)

27. The Ready Set - Love Like Woe (-6)

26. Uncle Kracker - Good To Be Me (-3)

25. Eminem/Rihanna - Love The Way You Lie (+18)

24. 2AM Club - Worry About You (+14)

23. Chiddy Bang - Opposite of Adults (+19)

22. OneRepublic - Secrets (=)

21. Sia - Clap Your Hands (+19)

20. Scouting for Girls - This Ain't A Love Song (-10)

19. 3OH!3/Kesha - My First Kiss (+12)

18. Train - If It's Love (-4)

17. Travie McCoy/Bruno Mars - Billionaire (-1)

16. Glee Cast - Don't Stop Believin' (+13)

15. Mike Posner - Cooler Than Me (+5)

14. Paramore - The Only Exception (-6)

13. Jason Derulo - In My Head (-6)

12. The Fratellis - Chelsea Dagger (+5)

11. Timbaland/Katy Perry - If We Ever Meet Again (-2)

10. We The Kings/Demi Lovato - We'll Be A Dream (+9)

9. Neon Trees - Animal (-3)

8. Taio Cruz/Ludacris - Break Your Heart (-4)

7. A Rocket to the Moon - Like We Used To (+5)

6. Lady Gaga - Alejandro (-1)

5. Maroon 5 - Misery (+10)

4. Kesha - Your Love is My Drug (-2)

3. Eminem - Not Afraid (+10)

2. Katy Perry - California Gurls (-1) (3 weeks at #1) 

1. B.o.B./Hayley Williams - Airplanes (+2) (1 week at #1)