"Dancing Queen" is the third Korean digital single by Girls' Generation. It was released on December 21, 2012 as a pre-release for their fourth Korean album I Got a Boy.
The song is a Korean remake of the 2008 single "Mercy" by Welsh singer Duffy.
Recorded in 2008, the song was initially scheduled to be released as the title track for the group's first mini-album. Nevertheless, the plan was withdrawn, and "Gee" and the mini-album of the same name was released instead.
Most parts of the music video of the song were filmed in 2008 as well.