Australian musicologist, Ian McFarlane, described their sound "trash pop style mixed tough guitar riffs with strong harmonies".

After a few months Hine left the band to join the newly formed Screaming Tribesmen and was replaced by Sue World (Wet Ones).

[1][2] The group signed with Timberyard Records and in October 1989 issued their debut double-A-sided single, "Surfing on a Wave of Love" / "He's Hell".

[1] In July 1992 Girl Monstar released their debut album, Monstereo Delicio, which was produced by Paul Kosky (Not Drowning, Waving) and Jedd Starr.

In 2010, Girl Monstar were featured in 'Rock Chicks' – an exhibition held at Melbourne's Arts Centre, which highlighted the achievements of women in the Australian music scene.