Lucie Jones poses for Wonderbra

X Factor finalist Lucie Jones has posed in her underwear for a new Wonderbra ad campaign.

The 19-year-old singer, who reached the final 12 on the 2009 series of the ITV1 reality show, is the face of Wonderbra's 'Full Effect' bra promotion.

Jones's pictures feature her wearing a £28 lingerie outfit which claims to boost a cleavage by two cup sizes.

Speaking about her new modelling role, the Welsh star said: "Because of X Factor my career was given a real life and it has enabled me to experience so many amazing things. Now I’m really excited that thanks to Wonderbra I can give other girls that same boost."

Jones admitted when she signed up with agency Select Model Management that the one area of her body she was not happy with was her chest. "I want big boobs," she said.