Eternal

Eternal are an English R&B girl group formed in 1992. The initial line-up consisted of sisters Easther and Vernie Bennett, Kéllé Bryan and Louise Nurding (now known by her married name, Louise Redknapp). Eternal became an international success and achieved fifteen Top 20 hits in the UK, and have sold around 10 million records worldwide. They were considered the UK's answer to the American girl group En Vogue.

source: Wikipedia