The Billboard Hot 100 for the 9/19/2009 issue

Now Last Weeks Peak

1 1 13 1 I Gotta Feeling - The Black Eyed Peas ()

2 2 10 2 Down - Jay Sean Featuring Lil Wayne (/Universal Republic)

3 3 4 2 Party In The U.S.A. - Miley Cyrus ()

4 6 6 3 Run This Town - Jay-Z, Rihanna & Kanye West ()

5 4 32 4 Use Somebody - Kings Of Leon (/RMG)

6 5 20 2 You Belong With Me - Taylor Swift (/Universal Republic)

7 11 9 7 Obsessed - Mariah Carey (/IDJMG)

8 9 12 8 Hotel Room Service - Pitbull (/RMG)

9 13 4 9 Whatcha Say - Jason DeRulo (/Warner Bros.)

10 7 18 2 Best I Ever Had - Drake (/Universal Motown)

11 8 24 3 Knock You Down - Keri Hilson Featuring Kanye West & Ne-Yo (/Interscope)

12 12 8 12 She Wolf - Shakira ()

13 10 15 7 Good Girls Go Bad - Cobra Starship Featuring Leighton Meester (/RRP)

14 15 12 14 Break Up - Mario Featuring Gucci Mane & Sean Garrett (/RMG)

15 18 10 12 Fallin' For You - Colbie Caillat ()

16 14 17 10 Battlefield - Jordin Sparks (/JLG)

17 20 14 17 Throw It In The Bag - Fabolous Featuring The-Dream (/IDJMG)

18 21 13 18 Big Green Tractor - Jason Aldean ()

19 17 26 1 Boom Boom Pow - The Black Eyed Peas (/Interscope)

20 16 19 9 Waking Up In Vegas - Katy Perry ()