One-third of the UK pop group Atomic Kitten who later became a TV celebrity on many UK reality competition shows.
She began singing at age twelve in the Starlight Show Group and was offered a place in Atomic Kitten after Heidi Range left the group early in their formation. With them, Hamilton released three albums and nineteen singles.
She was in the celebrity edition of Come Dine With Me, Celebrity Mr. and Mrs., Celebrity Weakest Link, and others, raising money for her favorite charities.
She dated Fran Cosgrave and the couple welcomed a son, Josh, in 2002, but split not long after his birth. In 2004 she and boyfriend Gavin Hatcher welcomed a son named Harry. Following their breakup she married Riad Erraji in 2007 and they welcomed a son, Alfie Riad Erraji in 2010. After her divorce from Erraji she began dating Ritchie Neville and together they had a daughter, Ella Rose.
Kerry Katona was her bandmate with Atomic Kitten and followed her into celebrity reality TV.