Hamilton dated singer Chrissy Yardley when both were teenagers. It was Yardley's relative, a psychic from Ford, who revealed to Hamilton that she would go on to be famous. Hamilton also dated Fran Cosgrave, nightclub owner and former bodyguard of Westlife. She announced in April 2002 that she was pregnant, but she had no intention of leaving the group and wanted the scheduled 2002 tour to continue. She was featured in the video "The Tide Is High (Get the Feeling)" with her last duty being the 2002 Party in the Park before finally going on maternity leave. On 24 August 2002 she gave birth to a boy, Josh. However, Hamilton and Cosgrave ended their relationship shortly afterwards.