Jessica Alba refuses to strip

Jessica Alba has insisted on a body double for her stripping scenes in 'Sin City 2', as she isn't happy with how she looks now she's had two children.

A source told Life and Style magazine: 'She was crushed when filming began and she didn't have her original body back so she told producers she wanted a body double.

'Her body is incredible, but for her it's not good enough. She's cut out carbs and does the P90X Ab Ripper twice a day, but she still isn't happy.'

Jessica, 31, has also reportedly been chain smoking to keep her mind off food.

The insider added: 'She's been chain smoking lately to keep her appetite at bay. Jessica struggled with an eating disorder in her teens and when she's under pressure to look good for a part, she can slip back into extreme behaviour.'