Heidi Range is a British singer, best known as a former member of the girl group Sugababes. She was an original member of girl group Atomic Kitten, although she left the group before they released any material. In 2001, Range replaced Siobhan Donaghy of the Sugababes and had accumulated six UK number-one singles as well as two number-one studio albums with the group before the line-up at the time disbanded in 2011. Since then, Range has concentrated on theatre work and motherhood. In 1997, Range auditioned for a part in the group Scooch, but was rejected as she was too young. Instead, she joined Atomic Kitten. She recorded several demos for the group's debut album. In 1999, after 8 months of recording with Atomic Kitten, Range decided to leave the group after being offered a solo deal by Stock Aitken Waterman. Range was recruited to audition as a new member of the Sugababes in August 2001.