Billboard Hot 100 - 2011
January 8
"Grenade" by Bruno Mars
"Grenade" was The Hot 100's #1 song on January 8.
January 15
"Firework" by Katy Perry
"Firework" was The Hot 100's #1 song on January 15.
January 22
"Grenade" by Bruno Mars
"Grenade" was The Hot 100's #1 song on January 22.
January 29
"Hold It Against Me" by Britney Spears
"Hold It Against Me" was The Hot 100's #1 song on January 29.
February 5
February 12
"Grenade" by Bruno Mars
"Grenade" was The Hot 100's #1 song on February 5 and February 12.
February 19
"Black And Yellow" by Wiz Khalifa
"Black And Yellow" was The Hot 100's #1 song on February 19.
February 26
March 5
March 12
March 19
March 26
April 2
"Born This Way" by Lady Gaga
"Born This Way" was The Hot 100's #1 song on February 26, March 5, March 12, March 19, March 26, and April 2.
April 9
April 16
April 23
"E.T." by Katy Perry Featuring Kanye West
"E.T." was The Hot 100's #1 song on April 9, April 16, and April 23.
April 30
"S&M" by Rihanna Featuring Britney Spears
"S&M" was The Hot 100's #1 song on April 30.
May 7
May 14
"E.T." by Katy Perry Featuring Kanye West
"E.T." was The Hot 100's #1 song on May 7 and May 14.
May 21
May 28
June 4
June 11
June 18
June 25
July 2
"Rolling In The Deep" by Adele
"Rolling In The Deep" was The Hot 100's #1 song on May 21, May 28, June 4, June 11, June 18, June 25, and July 2.
July 9
"Give Me Everything" by Pitbull Featuring Ne-Yo, Afrojack & Nayer
"Give Me Everything" was The Hot 100's #1 song on July 9.
July 16
July 23
July 30
August 6
August 13
August 20
"Party Rock Anthem" by LMFAO Featuring Lauren Bennett & GoonRock
"Party Rock Anthem" was The Hot 100's #1 song on July 16, July 23, July 30, August 6, August 13, and August 20.
August 27
September 3
"Last Friday Night (T.G.I.F.)" by Katy Perry
"Last Friday Night (T.G.I.F.)" was The Hot 100's #1 song on August 27 and September 3.
September 10
"Moves Like Jagger" by Maroon 5 Featuring Christina Aguilera
"Moves Like Jagger" was The Hot 100's #1 song on September 10.
September 17
"Someone Like You" by Adele
"Someone Like You" was The Hot 100's #1 song on September 17.
September 24
October 1
October 8
"Moves Like Jagger" by Maroon 5 Featuring Christina Aguilera
"Moves Like Jagger" was The Hot 100's #1 song on September 24, October 1, and October 8.
October 15
October 22
October 29
November 5
"Someone Like You" by Adele
"Someone Like You" was The Hot 100's #1 song on October 15, October 22, October 29, and November 5.
November 12
November 19
November 26
December 3
December 10
December 17
December 24