"Lay Down Sally" is a song performed by Eric Clapton, and written by Clapton, Marcy Levy, and George Terry. It appeared on his November 1977 album Slowhand, and reached No. 3 on the Billboard Hot 100 chart.

Marcella Levy, known professionally as Marcy Levy and Marcella Detroit, is an American singer, songwriter, and guitarist. She co-wrote the 1977 Eric Clapton hit "Lay Down Sally" and released her debut studio album Marcella in 1982. She joined Shakespears Sister in 1988 with ex-Bananarama member Siobhan Fahey. Their first two studio albums, Sacred Heart (1989), and Hormonally Yours (1992), both reached the top 10 of the UK Albums Chart. Detroit sang the lead vocals on their biggest hit, "Stay", which spent eight consecutive weeks at number one on the UK Singles Chart in 1992. Detroit left the band in 1993 and had a UK top 20 hit with "I Believe" in 1994. She formed the Marcy Levy Band in 2002, and finished third in the 2010 ITV series Popstar to Operastar.