# List of Billboard Hot 100 number ones of 2011

The Billboard Hot 100 is a chart that ranks the best-performing songs of the United States. Its data, published by Billboard magazine and compiled by Nielsen SoundScan, is based collectively on each single's weekly physical and digital sales, as well as airplay. In 2011, 14 singles claimed the top spot in 53 issues of the magazine, one of which, singer Katy Perry's "Firework" started its peak position in late 2010.
In 2011, nine acts achieved their first US number-one single, either as a lead artist or a featured guest: Wiz Khalifa, Adele, Pitbull, Afrojack, Nayer, LMFAO, Lauren Bennett, GoonRock and Calvin Harris. Six collaboration singles topped the chart. Pop singers Adele, Britney Spears, Katy Perry and Rihanna each earned two number-one songs during the year. One of Adele's songs, "Rolling in the Deep", was the best-performing single of 2011, topping the Billboard Year-End Hot 100. She became the fourth solo female to have multiple songs spend at least five weeks each at number one in one calendar year.
Rihanna's "We Found Love" was the longest-running single of the year, having topped the chart for eight consecutive weeks in 2011 and two additional weeks in 2012. It became only the eleventh single by a female solo artist to have spent at least ten weeks at number-one in the chart's history. Adele's "Rolling In the Deep" stayed at number one for seven consecutive weeks, while Lady Gaga's "Born This Way"—the 1,000th number-one single of the Hot 100—and LMFAO's "Party Rock Anthem" topped the chart for six consecutive weeks. Perry's "E.T." and Adele's "Someone Like You" each spent five weeks at the number-one spot.

## Chart history

Key :
| † | Indicates best-performing single of 2011 |
| No. | Issue date | Song | Artist(s) |
| 996 | January 1 | "Firework" | Katy Perry |
| 997 | January 8 | "Grenade" | Bruno Mars |
| re | January 15 | "Firework" | Katy Perry |
| re | January 22 | "Grenade" | Bruno Mars |
| 998 | January 29 | "Hold It Against Me" | Britney Spears |
| re | February 5 | "Grenade" | Bruno Mars |
| re | February 12 | "Grenade" | Bruno Mars |
| 999 | February 19 | "Black and Yellow" | Wiz Khalifa |
| 1000 | February 26 | "Born This Way" | Lady Gaga |
| 1000 | March 5 | "Born This Way" | Lady Gaga |
| 1000 | March 12 | "Born This Way" | Lady Gaga |
| 1000 | March 19 | "Born This Way" | Lady Gaga |
| 1000 | March 26 | "Born This Way" | Lady Gaga |
| 1000 | April 2 | "Born This Way" | Lady Gaga |
| 1001 | April 9 | "E.T." | Katy Perry featuring Kanye West |
| 1001 | April 16 | "E.T." | Katy Perry featuring Kanye West |
| 1001 | April 23 | "E.T." | Katy Perry featuring Kanye West |
| 1002 | April 30 | "S&M" | Rihanna featuring Britney Spears |
| re | May 7 | "E.T." | Katy Perry featuring Kanye West |
| re | May 14 | "E.T." | Katy Perry featuring Kanye West |
| 1003 | May 21 | "Rolling in the Deep"† | Adele |
| 1003 | May 28 | "Rolling in the Deep"† | Adele |
| 1003 | June 4 | "Rolling in the Deep"† | Adele |
| 1003 | June 11 | "Rolling in the Deep"† | Adele |
| 1003 | June 18 | "Rolling in the Deep"† | Adele |
| 1003 | June 25 | "Rolling in the Deep"† | Adele |
| 1003 | July 2 | "Rolling in the Deep"† | Adele |
| 1004 | July 9 | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack and Nayer |
| 1005 | July 16 | "Party Rock Anthem" | LMFAO featuring Lauren Bennett and GoonRock |
| 1005 | July 23 | "Party Rock Anthem" | LMFAO featuring Lauren Bennett and GoonRock |
| 1005 | July 30 | "Party Rock Anthem" | LMFAO featuring Lauren Bennett and GoonRock |
| 1005 | August 6 | "Party Rock Anthem" | LMFAO featuring Lauren Bennett and GoonRock |
| 1005 | August 13 | "Party Rock Anthem" | LMFAO featuring Lauren Bennett and GoonRock |
| 1005 | August 20 | "Party Rock Anthem" | LMFAO featuring Lauren Bennett and GoonRock |
| 1006 | August 27 | "Last Friday Night (T.G.I.F.)" | Katy Perry |
| 1006 | September 3 | "Last Friday Night (T.G.I.F.)" | Katy Perry |
| 1007 | September 10 | "Moves Like Jagger" | Maroon 5 featuring Christina Aguilera |
| 1008 | September 17 | "Someone Like You" | Adele |
| re | September 24 | "Moves Like Jagger" | Maroon 5 featuring Christina Aguilera |
| re | October 1 | "Moves Like Jagger" | Maroon 5 featuring Christina Aguilera |
| re | October 8 | "Moves Like Jagger" | Maroon 5 featuring Christina Aguilera |
| re | October 15 | "Someone Like You" | Adele |
| re | October 22 | "Someone Like You" | Adele |
| re | October 29 | "Someone Like You" | Adele |
| re | November 5 | "Someone Like You" | Adele |
| 1009 | November 12 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | November 19 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | November 26 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | December 3 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | December 10 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | December 17 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | December 24 | "We Found Love" | Rihanna featuring Calvin Harris |
| 1009 | December 31 | "We Found Love" | Rihanna featuring Calvin Harris |

## Number-one artists

List of number-one artists by total weeks at number one :
| Position | Artist | Weeks at No. 1 |
| 1 | Adele | 12 |
| 2 | Katy Perry | 9 |
| 2 | Rihanna | 9 |
| 4 | Calvin Harris | 8 |
| 5 | Lady Gaga | 6 |
| 5 | LMFAO | 6 |
| 5 | Lauren Bennett | 6 |
| 5 | Goonrock | 6 |
| 9 | Kanye West | 5 |
| 10 | Bruno Mars | 4 |
| 10 | Maroon 5 | 4 |
| 10 | Christina Aguilera | 4 |
| 13 | Britney Spears | 2 |
| 14 | Wiz Khalifa | 1 |
| 14 | Pitbull | 1 |
| 14 | Ne-Yo | 1 |
| 14 | Afrojack | 1 |
| 14 | Nayer | 1 |