The following list of weekly #1 songs is based upon seven monitored CHR/Pop radio Countdown shows (Rick Dees Weekly Top 40, American Top 40 with Ryan Seacrest, The Weekend Countdown with Billy Bush, Sirius XM Hits 1 Weekend Countdown with Spyder Harrison, MTV Weekend Countdown with Damien, The Weekend Top 30 with Hollywood Hamilton and Cannon’s Countdown with Nick Cannon):
April 23, 2011: S & M/RIHANNA (1/1)
April 30, 2011: E.T./KATY PERRY or KATY PERRY featuring KANYE WEST (1/5)
May 7, 2011: E.T./KATY PERRY or KATY PERRY featuring KANYE WEST (2/5)
May 14, 2011: E.T./KATY PERRY or KATY PERRY featuring KANYE WEST (3/5)
May 21, 2011: E.T./KATY PERRY or KATY PERRY featuring KANYE WEST (4/5)
May 28, 2011: E.T./KATY PERRY or KATY PERRY featuring KANYE WEST (5/5)
June 4, 2011: Rolling In The Deep/ADELE (1/6)
June 11, 2011: Rolling In The Deep/ADELE (2/6)
June 18, 2011: Rolling In The Deep/ADELE (3/6)
June 25, 2011: Rolling In The Deep/ADELE (4/6)
July 2, 2011: Rolling In The Deep/ADELE (5/6)
July 9, 2011: Rolling In The Deep/ADELE (6/6)
July 16, 2011: Give Me Everything/PITBULL featuring NE-YO, AFROJACK & NAYER (1/3)
July 23, 2011: Give Me Everything/PITBULL featuring NE-YO, AFROJACK & NAYER (2/3)
July 30, 2011: Give Me Everything/PITBULL featuring NE-YO, AFROJACK & NAYER (3/3)
August 6, 2011: The Party Rock Anthem/LMFAO featuring LAUREN BENNETT & GOON ROCK (1/1)
August 13, 2011: Last Friday Night (T.G.I.F.)/KATY PERRY (1/3)
August 20, 2011: Last Friday Night (T.G.I.F.)/KATY PERRY (2/3)
August 27, 2011: Last Friday Night (T.G.I.F.)/KATY PERRY (3/3)
September 3, 2011: I Wanna Go/BRITNEY SPEARS (1/3)
September 10, 2011: I Wanna Go/BRITNEY SPEARS (2/3)
September 17, 2011 : I Wanna Go/BRITNEY SPEARS (3/3)
September 24, 2011 : Moves Like Jagger/MAROON 5 f/ CHRISTINA AGUILERA (1/4)
October 1, 2011 : Moves Like Jagger/MAROON 5 f/ CHRISTINA AGUILERA (2/4)
October 8, 2011 : Moves Like Jagger/MAROON 5 f/ CHRISTINA AGUILERA (3/4)
October 15, 2011 : Moves Like Jagger/MAROON 5 f/ CHRISTINA AGUILERA (4/4)
October 22, 2011 : Someone Like You/ADELE (1/3)
October 29, 2011 : Someone Like You/ADELE (2/3)
November 5, 2011 : Someone Like You/ADELE (3/3)
November 12, 2011 : Stereo Hearts/GYM CLASS HEROES f/ ADAM LEVINE (1/3)
November 19, 2011 : Stereo Hearts/GYM CLASS HEROES f/ ADAM LEVINE (2/3)
November 26, 2011 : Stereo Hearts/GYM CLASS HEROES f/ ADAM LEVINE (3/3)
December 3, 2011 : Without You/DAVID GUETTA f/ USHER (1/?)
December 10, 2011 : Without You/DAVID GUETTA f/ USHER (2/?)