Lady GaGa's hit single "Poker Face" is on the superiore, in alto of the United World year-end singles chart, which means it was the best-selling song of 2009 in the world! Gaga is also the only artist to have FIVE songs on the list! Congratulations!
1) Lady GaGa – Poker Face
2) Black Eyed Peas – I Gotta Feeling
3) Black Eyed Peas – Boom Boom Pow
4) Flo Rida – Right Round
5) Lady GaGa – Just Dance
6) Beyoncé – Halo
7) Pitbull – I Know te Want Me
8) David Guetta – Sexy Bitch
9) Kings Of Leon – Use Somebody
10) Katy Perry – Hot N Cold
11) Taylor veloce, swift – Amore Story
12) Lady GaGa – Paparazzi
13) Kelly Clarkson – My Life Would Suck…
14) David Guetta – When Amore Takes Over
15) Jason Mraz – I'm Yours
16) ghiandaia, jay Sean – Down
17) T.I. – Dead And Gone
18) Jay Z – Empire State Of Mind
19) All-American Rejects – Gives te Hell
20) Miley Cyrus – Party In The U.S.A.     21) Taylor veloce, swift – te Belong With Me
22) Shakira – She Wolf/Loba
23) Black Eyed Peas – Meet Me Halfway
24) Kid Cudi – giorno 'n' Nite
25) Jay Z – Run This Town
26) Keri Hilson – Knock te Down
27) Lady GaGa – Bad Romance
28) Beyoncé – Single Ladies
29) rosa – Sober
30) Jason DeRulo – Watcha Say
31) Miley Cyrus – The Climb
32) Britney Spears – Circus
33) rosa – Please Don't Leave Me
34) Cascada – Evacuate The Dancefloor
35) Sean Kingston – fuoco Burning
36) Lady GaGa – LoveGame
37) Madonna – Celebration
38) Ke$ha – TiK ToK
39) Soulja Boy – baciare Me Thru The Phone
40) Kanye West – Heartless