"Just Dance" is the debut single by American recording artist Lady Gaga. The song was produced by RedOne and co-written by RedOne, Gaga and Akon, while also featuring labelmate Colby O'Donis. It was released in 2008 as the lead single from Gaga's debut studio album, The Fame. The song was written by Gaga in ten minutes as "a happy record". "Just Dance" also has influences of R&B and lyrically speaks about being intoxicated at a club.

The song received positive reviews from music critics, who complimented its club anthem-like nature and the synthpop associated with it. The song topped the charts in the United States, Australia, Canada, the Republic of Ireland, the Netherlands and the United Kingdom, as well as reaching the top ten in many other countries. In the United States, "Just Dance" was a sleeper hit, spending almost five months on the Billboard Hot 100 before finally reaching the summit of the chart in January 2009, after being released in April 2008. The single is among the best-selling singles of all time, having sold over 10 million copies.

The music video of the song portrayed Lady Gaga appearing in a party where she plays the song, prompting party-goers to start dancing in enjoyment. Gaga compared her experience of shooting the video with being on a Martin Scorsese set. "Just Dance" was performed by Gaga in a number of live appearances including all of her concert tours. In 2009, the song received a Grammy nomination in the Best Dance Recording category but lost to electronic duo Daft Punk for their song "Harder, Better, Faster, Stronger (Alive 2007)".

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