Heidi India Range (born 23 May 1983) is a British singer and songwriter from Liverpool, England best known for being the longest-serving current member of the Sugababes. Range was an original member of girl group Atomic Kitten, although she left the group after three years before releasing any material. In 2001 Range replaced Siobhán Donaghy of the Sugababes and has since accumulated six UK number one singles as well as two number one studio albums with the group.