Brian Leiser

Brian Andrew Leiser (better known as Fast, born 29 March 1972), is a member of the New York band Fun Lovin' Criminals. He plays bass, keyboards, harmonica and the trumpet. From 2021, following the departure of frontman Huey Morgan, Leiser took over duties as lead singer.

Fun Lovin' Criminals have enjoyed particular success in Europe but have also performed globally. The band's music is known worldwide.