Kimberley Walsh wants Jennifer Lopez's body.

The Girls Aloud beauty is famous herself for having a shapely rear and envious curves but she thinks the 'American Idol' judge has the perfect hour-glass figure.

She said: "It's a really tough call at the moment, but I think Jennifer Lopez is in great shape. She looks fantastic."

Kimberley - who is in a long-term relationship with Justin Scott - is not overly obsessed with her weight but has found a regime that works for her.

To maintain her sexy shape, the 29-year-old singer hits the gym several times a week, which means she can indulge in her favourite foods.

She explained: "I wouldn't necessarily say I'm too obsessive health-wise, but I have been working out for the past year or so. I've realised I can either exercise and eat normally or I can diet and not work out - so I work out. It's more fun and it definitely makes you feel more virtuous."