Labelle was an American R&B and funk duo formed in the late 1970s, best known for their hit single 'Lady Marmalade,' which became a defining anthem of the disco era and was later revived for the film 'Sister Act.' Composed of sisters Rita and Leanne Haywood, the group blended soulful vocals with a polished, upbeat production style that characterized much of their discography. Their catalog includes notable tracks such as 'Roll Out' and 'Superlover,' which showcased their signature harmonies and danceable rhythms. Though their commercial peak occurred in the 1970s, their music continues to resonate within the funk and R&B genres, celebrated for its infectious energy and the distinctive vocal interplay between the two Haywood sisters.