Mark Berry, better known as Bez, is an English percussionist, dancer, DJ and media personality. He is best known as a member of the rock bands Happy Mondays and Black Grape.

Happy Mondays are an English rock band formed in Salford in 1980. The original line-up was Shaun Ryder (vocals), his brother Paul Ryder (bass), Gary Whelan (drums), Paul Davis (keyboard), and Mark Day (guitar). Mark "Bez" Berry later joined the band onstage as a dancer/percussionist. Rowetta joined as a second vocalist in 1990. They were initially signed to Tony Wilson's Factory Records label.