December 18, 2010 – January 8, 2011: Firework – Katy Perry
January 9 – February 19, 2011: Grenade – Bruno Mars
February 20 – April 16, 2011: Born This Way – Lady Gaga
April 17 – July 2, 2011: E.T. – Katy Perry featuring Kanye West
July 3 – July 9, 2011: Rolling in the Deep – Adele
July 10 – September 10, 2011: Party Rock Anthem – LMFAO featuring Lauren Bennett and GoonRock
September 11 – September 17, 2011: Last Friday Night (T.G.I.F.) – Katy Perry
September 18 – October 1, 2011: Someone Like You – Adele
October 2 – October 8, 2011: Moves Like Jagger – Maroon 5 featuring Christina Aguilera
October 9 – November 26, 2011: Someone Like You – Adele
November 27 – December 3, 2011: We Found Love – Rihanna featuring Calvin Harris
December 4 – December 31, 2011: Sexy and I Know It – LMFAO