#1=Gold; Rise=Green; Top 20 Debut=Blue; Same/(Top 40 NEW/RETURN)=Gray; Fall=Red; Top 20 Return=Purple.
FALLOFFS:
~Justin Bieber - One Less Lonely Girl [LW: 38]
~Leona Lewis - Happy [LW: 36]
~Mariah Carey - Obsessed [LW: 34]
~Black Eyed Peas - Meet Me Halfway [LW: 29]
40. Timbaland & Justin Timberlake - Carry Out (NEW)
39. OneRepublic - All the Right Moves (NEW)
38. Jennifer Lopez - Louboutins (+2)
37. Taylor Swift - Fifteen (0)
36. Jason Derulo - Whatcha Say (-6)
35. Rihanna - Russian Roulette (-7)
34. Shontelle - Licky [Under the Covers] (+1)
33. Miley Cyrus - Party in the USA (-13)
32. P!nk - Funhouse (+1)
31. Pitbull & Akon - Shut It Down (NEW)
30. Ester Dean & Chris Brown - Drop It Low (+2)
29. Black Eyed Peas - Imma Be (NEW)
28. Allison Iraheta - Friday I'll Be Over U (+3)
27. Priscilla Renea - Dollhouse (0)
26. Boys Like Girls & Taylor Swift - Two Is Better Than One (-1)
25. Jason Derulo - In My Head (+14)
24. Adam Lambert - Whataya Want From Me (+2)
23. Kris Allen - Live Like We're Dying (0)
22. Beyoncé & Lady GaGa - Video Phone (+2)
21. Kelly Clarkson - Already Gone (-5)
20. Madonna & Akon - Celebration (+2)
19. Leighton Meester & Robin Thicke - Somebody to Love (+2)
18. John Mayer - Who Says (+1)
17. Owl City - Fireflies (-3)
16. Jay-Z & Alicia Keys - Empire State of Mind (-3)
15. Cascada - Evacuate the Dancefloor (-4)
14. Chris Brown, Lil' Wayne, & Swizz Beatz - I Can Transform Ya (+3)
13. Orianthi - According to You (+5)
12. Timbaland, Nelly Furtado, & SoShy - Morning After Dark (+3)
11. Drake, Kanye West, Lil' Wayne, & Eminem - Forever (+1)
10. Iyaz - Replay (-3)
09. Mariah Carey - All I Want For Christmas Is You (+1)
08. Rihanna & Jeezy - Hard (+1)
07. Jay Sean, Lil' Jon, & Sean Paul - Do You Remember (-1)
06. Lady GaGa & Beyoncé - Telephone (+2)
05. Lady GaGa - Bad Romance (-2)
04. Shakira, Lil' Wayne, & Timbaland - Give It Up to Me (-3)
03. Britney Spears - 3 (+1)
02. Ke$ha - TiK ToK (+3)
01. David Guetta & Akon - Sexy Bitch (+1)
#1s of 2009:
May 15: Flo Rida - Right Round May 22: Black Eyed Peas - Boom Boom Pow May 29: Kelly Clarkson - I Do Not Hook Up June 05: Flo Rida - Right Round (x2) June 12: Keri Hilson - Knock You Down June 19: Kristinia DeBarge - Goodbye June 26: Jordin Sparks - Battlefield July 03: David Guetta & Kelly Rowland - When Love Takes Over July 10: Britney Spears - Radar July 17: Black Eyed Peas - I Gotta Feeling July 24: Britney Spears - Radar (x2) July 31: Lady GaGa - LoveGame August 07: Lady GaGa - LoveGame (x2) August 14: Britney Spears - Radar (x3) August 21: Drake - Best I Ever Had August 28: Cascada - Evacuate the Dancefloor September 04: Jay Sean & Lil' Wayne - Down September 11: Jason DeRulo - Whatcha Say September 18: Lady GaGa - Paparazzi September 25: Lady GaGa - Paparazzi (x2) October 02: Britney Spears - 3 October 09: Jay-Z, Rihanna, & Kanye West - Run This Town October 16: Kelly Clarkson - Already Gone October 23: Rihanna - Russian Roulette October 30: Rihanna - Russian Roulette (x2) November 06: David Guetta & Akon - Sexy Bitch November 13: David Guetta & Akon - Sexy Bitch (x2) November 20: David Guetta & Akon - Sexy Bitch (x3) November 27: Lady GaGa - Bad Romance December 04: Ke$ha - TiK ToK December 11: Shakira, Lil' Wayne, & Timbaland - Give It Up to Me December 18: David Guetta & Akon - Sexy Bitch (x4) Most This Year
#1=Gold; Rise=Green; Top 20 Debut=Blue; Same/(Top 40 NEW/RETURN)=Gray; Fall=Red; Top 20 Return=Purple.
FALLOFFS:
~Jason Derulo - Whatcha Say [LW: 36]
40. Miley Cyrus - Party in the USA (-7)
39. P!nk - Funhouse (-7)
38. Ester Dean & Chris Brown - Drop It Low (-8)
37. Priscilla Renea - Dollhouse (-10)
36. Rihanna - Russian Roulette (-1)
35. Taylor Swift - Fifteen (+2)
34. Young Money & Lloyd - Bedrock (NEW)
33. Jennifer Lopez - Louboutins (+5)
32. Boys Like Girls & Taylor Swift - Two Is Better Than One (-6)
31. Shontelle - Licky [Under the Covers] (+3)
30. Kelly Clarkson - Already Gone (-9)
29. Allison Iraheta - Friday I'll Be Over U (-1)
28. Adam Lambert - Whataya Want From Me (-4)
27. Kris Allen - Live Like We're Dying (-4)
26. Pitbull & Akon - Shut It Down (+5)
25. Jason Derulo - In My Head (0)
24. OneRepublic - All the Right Moves (+15)
23. Timbaland & Justin Timberlake - Carry Out (+17)
22. Beyoncé & Lady GaGa - Video Phone (0)
21. Black Eyed Peas - Imma Be (+8)
20. Owl City - Fireflies (-3)
19. John Mayer - Who Says (-1)
18. Chris Brown, Lil' Wayne, & Swizz Beatz - I Can Transform Ya (-4)
17. Cascada - Evacuate the Dancefloor (-2)
16. Madonna & Akon - Celebration (+4)
15. Iyaz - Replay (-5)
14. Jay-Z & Alicia Keys - Empire State of Mind (+2)
13. Leighton Meester & Robin Thicke - Somebody to Love (+6)
12. Orianthi - According to You (+1)
11. Jay Sean, Lil' Jon, & Sean Paul - Do You Remember (-4)
10. Timbaland, Nelly Furtado, & SoShy - Morning After Dark (+1)
09. Drake, Kanye West, Lil' Wayne, & Eminem - Forever (+2)
08. Shakira, Lil' Wayne, & Timbaland - Give It Up to Me (-4)
07. Lady GaGa & Beyoncé - Telephone (-1)
06. Rihanna & Jeezy - Hard (+2)
05. Ke$ha - TiK ToK (-3)
04. Britney Spears - 3 (-1)
03. David Guetta & Akon - Sexy Bitch (-2)
02. Lady GaGa - Bad Romance (+3)
01. Mariah Carey - All I Want For Christmas Is You (+8)
#1s of 2009:
May 15: Flo Rida - Right Round May 22: Black Eyed Peas - Boom Boom Pow May 29: Kelly Clarkson - I Do Not Hook Up June 05: Flo Rida - Right Round (x2) June 12: Keri Hilson - Knock You Down June 19: Kristinia DeBarge - Goodbye June 26: Jordin Sparks - Battlefield July 03: David Guetta & Kelly Rowland - When Love Takes Over July 10: Britney Spears - Radar July 17: Black Eyed Peas - I Gotta Feeling July 24: Britney Spears - Radar (x2) July 31: Lady GaGa - LoveGame August 07: Lady GaGa - LoveGame (x2) August 14: Britney Spears - Radar (x3) August 21: Drake - Best I Ever Had August 28: Cascada - Evacuate the Dancefloor September 04: Jay Sean & Lil' Wayne - Down September 11: Jason DeRulo - Whatcha Say September 18: Lady GaGa - Paparazzi September 25: Lady GaGa - Paparazzi (x2) October 02: Britney Spears - 3 October 09: Jay-Z, Rihanna, & Kanye West - Run This Town October 16: Kelly Clarkson - Already Gone October 23: Rihanna - Russian Roulette October 30: Rihanna - Russian Roulette (x2) November 06: David Guetta & Akon - Sexy Bitch November 13: David Guetta & Akon - Sexy Bitch (x2) November 20: David Guetta & Akon - Sexy Bitch (x3) November 27: Lady GaGa - Bad Romance December 04: Ke$ha - TiK ToK December 11: Shakira, Lil' Wayne, & Timbaland - Give It Up to Me December 18: David Guetta & Akon - Sexy Bitch (x4) Most This Year December 25: Mariah Carey - All I Want For Christmas Is You
That song's gonna rank high on my year-end list. 
