Wikipedia
"Y.M.C.A." is a song by the American disco group Village People. It was released in 1978 as the only single from their third studio album Cruisin' (1978). The song reached number 2 on the US charts in early 1979 and reached number 1 in the UK around the same time, becoming the group's biggest hit. It is one of fewer than forty singles to have sold 10 million (or more) physical copies worldwide. A medley with " Hot Cop" reached number 2 on Billboard's Dance Music/Club Play Singles chart.
The song remains popular and is played at many sporting events in the U.S. and Europe, with crowds using the dance in which the arms are used to spell out the four letters of the song's title as an opportunity to stretch. Moreover, the song also remains particularly popular due to its status as a disco classic. "Y.M.C.A." appeared as Space Shuttle Wakeup call on mission STS-106, on day 11.
In 2009, "Y.M.C.A." was entered into the Guinness World Book of Records when over 44,000 people danced to the song with Village People singing live at the 2008 Sun Bowl game in El Paso, Texas. "Y.M.C.A." is number 7 on VH1's list of The 100 Greatest Dance Songs of the 20th Century.