Antoinette "Toni" Halliday (born July 1964 in Parsons Green, Fulham) is an English musician best known as the lead vocalist, lyricist, and occasional guitarist of the band Curve. Halliday officially left Curve on 31 January 2005, having served as the group's lead singer since 1991. In Curve, she had worked with multi-instrumentalist Dean Garcia; their collaboration had spawned a number of singles, EPs, and full-length albums.

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