Gallup first joined The Cure in 1979, replacing Michael Dempsey on bass guitar. He also has been credited for occasionally playing the keyboard, particularly after Matthieu Hartley's departure in 1980; he took over keyboard lines for many of the songs that Hartley played. Examples of songs he played keyboard on live include "At Night", "A Forest", "A Strange Day" and "Pornography". During "Cold" he multi-tasked playing bass guitar and bass pedals.

Read more about Simon Gallup on Last.fm.