Z100's Top 100 Songs Of 2009:

100. Flo Rida feat. Ne-Yo - Be On You
99. Taylor Swift - Fifteen
98. Michael Franti & Spearhead - Say Hey (I Love You)
97. John Legend feat. Andre 3000 - Green Light
96. Beyonce - If I Were A Boy
95. Jonas Brothers - Paranoid
94. Colbie Caillat - Fallin' For You
93. Kevin Rudolf feat. Rick Ross - Welcome To The World
92. The Ting Tings - That's Not My Name
91. Daughtry - No Surprise
90. Guru Josh Project - Infinity 2008
89. Owl City - Fireflies
88. Livvi Franc feat. Pitbull - Now I'm That Chick
87. Jay Sean feat. Sean Paul - Do You Remember?
86. Matt Nathanson - Come On Get Higher
85. Justin Bieber - One Less Lonely Girl
84. Jeremih - Birthday Sex
83. Rihanna - Russian Roulette
82. Akon - Right Now (Na Na Na)
81. Fabolous feat. The-Dream - Throw It In The Bag
80. David Guetta feat. Akon - Sexy Chick
79. Eminem feat. Dr. Dre & 50 Cent - Crack A Bottle
78. Britney Spears - Womanizer
77. Shakira - She Wolf
76. Kid Cudi - Day N Nite
75. Leona Lewis - I Will Be
74. Jesse McCartney feat. T-Pain - Body Language
73. Shakira feat. Lil Wayne - Give It Up To Me
72. Kris Allen - Live Like We're Dying
71. Iyaz - Replay
70. Flo Rida feat. Wynter - Sugar
69. The Fray - Never Say Never
68. Justin Bieber - One Time
67. Katy Perry - Thinking Of You
66. Lady GaGa - Bad Romance
65. Ciara feat. Justin Timberlake - Love Sex Magic
64. Akon feat. Colby O'Donis & Kardinal Offishall - Beautiful
63. Black Eyed Peas - Meet Me Halfway
62. Shinedown - Second Chance
61. Sean Paul - So Fine
60. Soulja Boy feat. Sammie - Kiss Me Thru The Phone
59. Ke$ha - TiK ToK
58. Nickelback - Gotta Be Somebody
57. Britney Spears - Radar
56. Kelly Clarkson - Already Gone
55. Pitbull - Hotel Room Service
54. Jamie Foxx feat. T-Pain - Blame It
53. Ne-Yo - Miss Independent
52. The Veronicas - Untouched
51. The Pussycat Dolls - Hush Hush
50. Kristinia Debarge - Goodbye
49. Kim Sozzi - Feel Your Love
48. Drake - Best I Ever Had
47. Boys Like Girls - Love Drunk
46. Mariah Carey - Obsessed
45. Jason Derulo - Whatcha Say
44. Ne-Yo - Mad
43. David Guetta feat. Kelly Rowland - When Love Takes Over
42. Kanye West - Heartless
41. Kelly Clarkson - I Do Not Hook Up
40. Jay-Z feat. Rihanna & Kanye West - Run This Town
39. P!nk - Please Don't Leave Me
38. 3OH!3 - Don't Trust Me
37. Beyonce - Single Ladies (Put A Ring On It)
36. Miley Cyrus - Party In The USA
35. Jesse McCartney feat. Ludacris - How Do You Sleep?
34. Sean Kingston - Fire Burning
33. Lady GaGa - LoveGame
32. Britney Spears - If U Seek Amy
31. Jason Mraz - I'm Yours
30. Jay-Z feat. Alicia Keys - Empire State Of Mind
29. The Pussycat Dolls - I Hate This Part
28. T.I. feat. Rihanna - Live Your Life
27. Kanye West - Love Lockdown
26. Britney Spears - 3
25. Cobra Starship feat. Leighton Meester - Good Girls Go Bad
24. Beyonce - Sweet Dreams
23. Miley Cyrus - The Climb
22. Britney Spears - Circus
21. P!nk - Sober
20. The Fray - You Found Me
19. Lady GaGa - Paparazzi
18. Taylor Swift - Love Story
17. Pitbull - I Know You Want Me (Calle Ocho)
16. Kings Of Leon - Use Somebody
15. Black Eyed Peas - Boom Boom Pow
14. T.I. feat. Justin Timberlake - Dead And Gone
13. Katy Perry - Waking Up In Vegas
12. Keri Hilson feat. Kanye West & Ne-Yo - Knock You Down
11. The All-American Rejects - Gives You Hell
10. Jordin Sparks - Battefield
9. Cascada - Evacuate The Dancefloor
8. Lady GaGa feat. Colby O'Donis & Akon - Just Dance
7. Flo Rida feat. Ke$ha - Right Round
6. Beyonce - Halo
5. Kelly Clarkson - My Life Would Suck Without You
4. Jay Sean feat. Lil Wayne - Down
3. Lady GaGa - Poker Face
2. Taylor Swift - You Belong With Me
1. Black Eyed Peas - I Gotta Feeling