She starred in the pantomime "Snow White" at the Regent Theatre, Stoke-on-Trent in December 2008. In 2008, she was the main figure in the documentary "Claire Sweeney's Big Fat Diet" on ITV in which she gained 2 stones (13 kilograms) in 6 weeks to prove that lack of eating and training habits can damage your health. She then starred in the touring production of the musical "Shout!" alongside Su Pollard. In March 2009, Sweeney appeared in adverts for Dulux paint, and became the face of Park Christmas Savings. In December 2009, she starred as 'Carrion the Wicked Fairy' in "Sleeping Beauty" alongside comedian Kev Orkian at the Churchill Theatre, Bromley.