1.LMFAO / Party Rock Anthem (#1 for 6weeks in 2011) 2.KESHA / Tik Tok (#1 for 9weeks in 2010) 3.RIHANNA / We Found Love (#1 for 8weeks in 2011) 4.RIHANNA / S&M (#1 for 1week in 2011) 5.PITBULL / Give Me Everything (#1 for 1week in 2011) 6.OWL CITY / Firefly (#1 for 1week in 2009) 7.TAIO CRUZ / Break Your Heart (#1 for 1week in 2010) 8.USHER / O.M.G. (#1 for 4weeks in 2010) 9.BEYONCE / Single Ladies (#1 for 4weeks in 2008/09) 10.LADY GAGA / Poker Face (#1 for 1week in 2009) 11.LADY GAGA / Born This Way (#1 for 6weeks in 2011) 12.MARIAH / Touch My Body (#1 for 2weeks in 2008) 13.MAROON 5 / Moves Like Jagger (#1 for 4weeks in 2011) 14.ADELE / Rolling In The Deep (#1 for 7weeks in 2011) 15.KATY PERRY / Last Friday Night T.G.I.F. (#1 for 2weeks in 2011) 16.KATY PERRY / E.T. (#1 for 5weeks in 2011) 17.KATY PERRY / Firework (#1 for 4weeks in 2010/11) 18.LMFAO / Sexy & I Know It (#1 for week ending of 2011 into 2012)
