London: Former Girls Aloud singer Nicola Roberts says she wishes to gain weight because she wants a more womanly figure.

Roberts, 25, is famed for her tiny frame but she insists no matter how much she eats she can't put on weight and is often envious of bandmate Kimberley Walsh's curvy figure, a website reported.

"I'd say to Kimberley that I wish I could put weight on. I look at her curves and I'm there stuffing my face but it just doesn't work. I used to be a dancer so I have muscle memory, I can literally carry bags of food shopping and my arms go muscle. I can't bear it. I want them to be smoother and more womanly," she said.

However, Roberts has learnt to accept what she looks like.

"It's healthier if you think optimistically because there are always people out there who are in a far worse situation than you are. If you're born with pale skin, you're born with pale skin just as if you're born with olive skin. Whatever shape you are, colour you or size you are, it's just what you're born with," she added.