2011

Chart Number One
January 1

"Raise Your Glass" - Pink

January 8

"We R Who We R" - Ke$ha

January 15

"Firework" - Katy Perry

January 22

"Start A Fire" - Ryan Star

January 29

"Start A Fire" - Ryan Star

February 5

"Grenade" - Bruno Mars

February 12

"Grenade" - Bruno Mars

February 19

"Grenade" - Bruno Mars

February 26

"Grenade" - Bruno Mars

March 5

"Grenade" - Bruno Mars

March 12

"Hold It Against Me" - Britney Spears

March 19

"What Doesn't Kill You (Stronger)" - Kelly Clarkson

March 26

"What The Hell" - Avril Lavigne

April 2

"Born This Way" - Lady GaGa

April 9

"Born This Way" - Lady GaGa

April 16

"Born This Way" - Lady GaGa

April 23

"Born This Way" - Lady GaGa

April 30

"S&M" - Rihanna featuring Britney Spears

May 7

"S&M" - Rihanna featuring Britney Spears

May 14

"E.T." - Katy Perry featuring Kanye West

May 21

"On The Floor" - Jennifer Lopez featuring Pitbull

May 28

"On The Floor" - Jennifer Lopez featuring Pitbull

June 4

"Till The World Ends" - Britney Spears featuring Nicki Minaj & Ke$ha

June 11

"Judas" - Lady GaGa

June 18

"Judas" - Lady GaGa

June 25

"Judas" - Lady GaGa

July 2

"Judas" - Lady GaGa

July 9

"The Edge Of Glory" - Lady GaGa

July 16

"The Edge Of Glory" - Lady GaGa

July 23

"The Edge Of Glory" - Lady GaGa

July 30

"The Edge Of Glory" - Lady GaGa

August 6

"The Edge Of Glory" - Lady GaGa

August 13

"The Edge Of Glory" - Lady GaGa

August 20

"Last Friday Night (T.G.I.F.)" - Katy Perry

August 27

"Last Friday Night (T.G.I.F.)" - Katy Perry

September 3

"Last Friday Night (T.G.I.F.)" - Katy Perry

September 10

"Last Friday Night (T.G.I.F.)" - Katy Perry

September 17

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

September 24

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

October 1

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

October 8

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

October 15

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

October 22

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

October 29

"Moves Like Jagger" - Maroon 5 featuring Christina Aguilera

November 5

"Free" - Natalia Kills featuring Will.i.am

November 12

"Free" - Natalia Kills featuring Will.i.am

November 19

"Free" - Natalia Kills featuring Will.i.am

November 26

"We Found Love" - Rihanna featuring Calvin Harris

December 3

"We Found Love" - Rihanna featuring Calvin Harris

December 10

"We Found Love" - Rihanna featuring Calvin Harris

December 17

"We Found Love" - Rihanna featuring Calvin Harris

December 24

"We Found Love" - Rihanna featuring Calvin Harris

December 31

"We Found Love" - Rihanna featuring Calvin Harris