Atomic Kitten were an English girl group, first established in 1997 in Liverpool. The original line-up featured, Liz McClarnon, Kerry Katona and Heidi Range (now in the Sugababes), but Range decided to quit and was replaced by Natasha Hamilton. Jenny Frost (formerly of Precious) replaced Katona in 2001. Hamilton, McClarnon & Frost were the final and most successful line-up of the group. Atomic Kitten had three UK number one singles; Whole Again,