List of Billboard number-one dance singles of 2009

The first number-one Dance Club Song of the year was "I Hate This Part" by American pop girl group The Pussycat Dolls, which spent two consecutive weeks atop the chart.

[1][2] Multiple artists made one chart appearance, including The Killers with "Human",[3] Donna Summer with "Fame (The Game)",[4] LeAnn Rimes with "What I Cannot Change",[5] Shontelle with "T-Shirt",[6] and Lily Allen with "The Fear".

[8][9][10] French DJ David Guetta topped the Dance Club chart two times with "Sexy Bitch", a collaboration with Akon,[11] and with "When Love Takes Over", a collaboration with Kelly Rowland; "When Love Takes Over spent two consecutive weeks atop the chart,[12][13] and ranked at number one on the 2009 Hot Dance Club Songs year end chart.

The former topped the chart with "Single Ladies (Put a Ring on It)",[20] "Diva",[21] "Halo",[22] and "Sweet Dreams".

[23] The latter topped the chart with the songs "Poker Face",[24] "LoveGame",[25] "Paparazzi",[26] and "Bad Romance".

A woman wearing a long metallic gold outfit
Beyoncé attained four number one songs on the chart throughout the course of 2009, with " Single Ladies (Put a Ring on It) ", [ 20 ] " Diva ", [ 21 ] " Halo ", [ 22 ] and " Sweet Dreams ". [ 23 ]
A blonde woman wearing a lblack dress performing
Mariah Carey topped the chart twice with " I Stay in Love ", [ 8 ] and with " Obsessed ". [ 9 ]
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David Guetta and Kelly Rowland 's collaboration " When Love Takes Over " ranked at number one on the 2009 Hot Dance Club Songs year end chart. [ 14 ]
A picture of a woman wearing a yellow leotard performing
Whitney Houston topped the chart with " Million Dollar Bill ". [ 28 ]
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Jordin Sparks song " S.O.S. (Let the Music Play) " peaked at number one on the chart on December 5, 2009. [ 29 ]
A young woman on-stage wearing a studded leather bra
Lady Gaga 's " Poker Face " was a dance airplay number one for 15 weeks.