1Jennifer Lopez-On The Floor 2 Cee Lo Green-Fuck You 3 Katy Perry-ET 4 Bruno Mars-Grenade 5 Ke$ha-We R Who We R 6 Enrique Iglesias feat. Ludacris-Tonight 7 P!nk-Raise Your Glass 8 Rihanna-What's My Name 9 P!nk-Fuckin Perfect 10 Rihanna-S&M 11 Katy Perry-Firework 12 Eminem-I Need A Doctor 13 Britney Spears - Hold it Against Me 14 Lady GaGa-Born This Way 15 Wiz Khalifa-Black And Yellow 都是2011美国公告榜排过冠军的歌
追问格式啊
看不懂= =