Mark Stewart was an English singer and founding member of the Pop Group. A pioneer of post-punk and industrial music, he recorded for On-U Sound Records, Mute Records, and Future Noise Music, and released solo and collaborative output on several other independent labels such as Crippled Dick Hot Wax! and eMERGENCY heARTS.

The Pop Group are an English rock band formed in Bristol in 1977 by vocalist Mark Stewart, guitarist John Waddington, bassist Simon Underwood, guitarist/saxophonist Gareth Sager, and drummer Bruce Smith. Their work in the late 1970s crossed diverse musical influences including punk, dub, funk, and free jazz with radical politics, helping to pioneer post-punk music.