Yin and yang: Sarah Harding shows off her toned stomach

Sarah piped her Girls Aloud bandmates to become an Ultimo spokesmodel in 2006 and models their A-C line. The latest Spring/Summer 2008 shots mark her last campaign as an 'Ultimo Angel'.

The pop star admits she spent time in gym getting in top shape for the new ad: "I am not a supermodel like all the other previous Ultimo models so I worked really hard to look the best I possibly could."

Ultimo creator Michelle Mone said: "Sarah has been great to work with. When Sarah was signed as The Face and Body of Ultimo in 2006, she was not a professional model like her predecessors, however, the more Ultimo photoshoots she experienced, the more confident she became.

Busty beauty: Gemma Atkinson is the face of Ultimo's D-F range

"It has been a pleasure to work with Sarah and I wish her all the best for the future. Sarah's successor will be named soon."

Gemma and Sarah follow in the footsteps of previous Ultimo models Rachel Hunter, Penny Lancaster and Helena Christensen.

The latest Ultimo collection is available from Debenhams stores nationwide.