These are the Billboard magazine's number-one dance songs of 2004 on the Dance Club Songs, the Dance Singles Sales, and the Dance/Mix Show Airplay. The Hot Dance Club Songs was first published in 1976, ranking the most popular songs on dance club based on reports from a national sample of club DJs. The Dance/Mix Show Airplay was first published in 2003, ranking the songs based on dance radio airplay and mix-show plays on top 40 radio and select rhythmic radio as measured by Mediabase.