Katy Perry is the New #1 in Billboard!

Katy Perry hits the #1 in the Billboard, After Pink "Raise your Glass" Now its Katy Perry is the New #1 in the Billboard Countdown...

Here are the Top 10 Music Countdown of the  Billboard top 100:

1. Firework - Katy Perry
2. Raise your Glass - Pink
3. Whats my Name - Rihanna ft. Drake
4. The Time - Black Eyed Peas
5. Grenade - Bruno mars
6. Only Girl - Rihanna
7. Just the way you are - Bruno Mars
8. We R Who We R - Kesha
9. Just A Dream - Nelly
10. Bottom Up - Trey Songz ft. Nicki Minaj