Welcome to BillboardTop100of.com
2009
| 1 | The Black Eyed Peas | Boom Boom Pow |
| 2 | Lady Gaga | Poker Face |
| 3 | Lady Gaga feat. Colby O’Donis | Just Dance |
| 4 | The Black Eyed Peas | I Gotta Feeling |
| 5 | Taylor Swift | Love Story |
| 6 | Flo Rida | Right Round |
| 7 | Jason Mraz | I’m Yours |
| 8 | Beyonce | Single Ladies (Put A Ring On It) |
| 9 | Kanye West | Heartless |
| 10 | The All-American Rejects | Gives You Hell |
| 11 | Taylor Swift | You Belong With Me |
| 12 | T.I. feat. Justin Timberlake | Dead And Gone |
| 13 | The Fray | You Found Me |
| 14 | Kings Of Leon | Use Somebody |
| 15 | Keri Hilson feat. Kanye West and Ne-Yo | Knock You Down |
| 16 | Jamie Foxx feat. T-Pain | Blame It |
| 17 | Pitbull | I Know You Want Me (Calle Ocho) |
| 18 | T.I. feat. Rihanna | Live Your Life |
| 19 | Soulja Boy Tell ’em feat. Sammie | Kiss Me Thru The Phone |
| 20 | Jay Sean feat. Lil Wayne | Down |
| 21 | Miley Cyrus | The Climb |
| 22 | Drake | Best I Ever Had |
| 23 | Kelly Clarkson | My Life Would Suck Without You |
| 24 | Beyonce | Halo |
| 25 | Katy Perry | Hot n Cold |
| 26 | Shinedown | Second Chance |
| 27 | Britney Spears | Circus |
| 28 | Kid Cudi | Day ‘n’ Nite |
| 29 | Miley Cyrus | Party in the U.S.A. |
| 30 | 3OH!3 | Don’t Trust Me |
| 31 | Jay-Z, Rihanna and Kanye West | Run This Town |
| 32 | Kevin Rudolf feat. Lil Wayne | Let It Rock |
| 33 | Sean Kingston | Fire Burning |
| 34 | Jason DeRulo | Whatcha Say |
| 35 | Lady Gaga | Lovegame |
| 36 | Katy Perry | Waking Up In Vegas |
| 37 | Jeremih | Birthday Sex |
| 38 | Pink | Sober |
| 39 | Britney Spears | Womanizer |
| 40 | T.I. | Whatever You Like |
| 41 | Mariah Carey | Obsessed |
| 42 | Ne-Yo | Mad |
| 43 | Cobra Starship feat. Leighton Meester | Good Girls Go Bad |
| 44 | Kanye West | Love Lockdown |
| 45 | Pink | So What |
| 46 | Pitbull | Hotel Room Service |
| 47 | Eminem, Dr. Dre and 50 Cent | Crack A Bottle |
| 48 | Beyonce | If I Were A Boy |
| 49 | Keri Hilson feat. Lil Wayne | Turning Me On |
| 50 | The Pussycat Dolls | I Hate This Part |
| 51 | Nickelback | Gotta Be Somebody |
| 52 | Pink | Please Don’t Leave Me |
| 53 | Lady Gaga | Paparazzi |
| 54 | Akon feat. Colby O’Donis and Kardinal Offishall | Beautiful |
| 55 | Coldplay | Viva la Vida |
| 56 | Akon | Right Now (Na Na Na) |
| 57 | Jordin Sparks | Battlefield |
| 58 | Flo Rida feat. Wynter | Sugar |
| 59 | Ne-Yo | Miss Independent |
| 60 | Owl City | Fireflies |
| 61 | Linkin Park | New Divide |
| 62 | Jay-Z + Alicia Keys | Empire State Of Mind |
| 63 | Daughtry | No Surprise |
| 64 | Shakira | She Wolf |
| 65 | Mario feat. Gucci Mane and Sean Garrett | Break Up |
| 66 | Beyonce | Sweet Dreams |
| 67 | Young Money | Every Girl |
| 68 | Colbie Caillat | Fallin’ For You |
| 69 | The Veronicas | Untouched |
| 70 | Nickelback | If Today Was Your Last Day |
| 71 | Fabolous feat. The-Dream | Throw It In The Bag |
| 72 | Boys Like Girls | Love Drunk |
| 73 | Asher Roth | I Love College |
| 74 | Britney Spears | If U Seek Amy |
| 75 | Jason Aldean | Big Green Tractor |
| 76 | Taylor Swift | White Horse |
| 77 | Rihanna | Disturbia |
| 78 | Green Day | 21 Guns |
| 79 | Soulja Boy Tell’em | Turn My Swag On |
| 80 | The-Dream | Rockin’ That Thang |
| 81 | Zac Brown Band | Chicken Fried |
| 82 | Beyonce | Diva |
| 83 | Iyaz | Replay |
| 84 | Brad Paisley | Then |
| 85 | Rob Thomas | Her Diamonds |
| 86 | Jesse McCartney feat. Ludacris | How Do You Sleep? |
| 87 | Britney Spears | 3 |
| 88 | Drake feat. Kanye West, Lil Wayne and Eminem | Forever |
| 89 | Justin Bieber | One Time |
| 90 | Lady Antebellum | I Run To You |
| 91 | Kelly Clarkson | I Do Not Hook Up |
| 92 | John Legend feat. Andre 3000 | Green Light |
| 93 | Billy Currington | People Are Crazy |
| 94 | Zac Brown Band | Whatever It Is |
| 95 | Kelly Clarkson | Already Gone |
| 96 | Kristinia DeBarge | Goodbye |
| 97 | Michael Franti and Spearhead feat. Cherine Anderson | Say Hey (I Love You) |
| 98 | Jim Jones and Ron Browz feat. Juelz Santana | Pop Champagne |
| 99 | Maxwell | Pretty Wings |
| 100 | The Fray | Never Say Never |