Killer was a rock band founded in 1999 in Helsinki, Finland. Although Killer was a quartet, vocalist Siiri Nordin was by far the most visible member. Notable were the different music styles that influenced their tracks: Siiri grew up with jazz & blues but the influences of the band included grunge pioneers such as Pearl Jam & Nirvana (Timo), electronic music (guitarist Tumppi) and even funk & folk (drummer Teijo, who used to earn a living in a folk-based outfit).

The group's debut single Hurricane was released in February 2001. In August 2001 the debut was followed up by All I Want – a track that topped the local airplay list and made it to No. 2 on the charts, moving the band's debut album 'Sickeningly Pretty And Unpleasantly Vain' up to gold.