1. Bruno Mars - Grenade ***
2. Rihanna - What's My Name ***
3. Ciara - Gimme Dat ***
4. Rihanna - S&M ***
5. Jesse McCartney - Shake ***
6. Katy Perry - Firework **
7. Ke$ha - We R Who We R ***
8. Rihanna - Only Girl (In The World) ***
9. BEP - The Time (Dirty Bit) ***
10. Crystal Bowersox - Farmer's Daughter*
Bruno Mars jumps 5-1 with Grenade in his ***3 week charting.
Rihanna's What's My Name falls 1-2, also marking a ***3 week charting.
Nelly falls off after spending **2 weeks at number 9, overtaken by BEP, 10-9.
Crystal Bowersox's new single makes a debut at number 10.
1. Bruno Mars - Grenade ****
2. Rihanna - What's My Name ****
3. Ciara - Gimme Dat ****
4. Rihanna - S&M ****
5. Jesse McCartney - Shake ****
6. Katy Perry - Firework ***
7. Ke$ha - We R Who We R ****
8. Rihanna - Only Girl (In The World) ****
9. BEP - The Time (Dirty Bit) ****
10. Crystal Bowersox - Farmer's Daughter**