"3 a.m. Eternal" is a song by British acid house group the KLF, taken from their fourth and final studio album, The White Room (1991). Numerous versions of the song were released as singles between 1989 and 1992 by their label KLF Communications. In January 1991, an acid house pop version of the song became an international top ten hit single, reaching number-one on the UK Singles Chart, number two on the UK Dance Singles Chart and number five on the US Billboard Hot 100, and leading to the KLF becoming the internationally biggest-selling singles band of 1991.[1][2]