Girls Aloud singer Nicola Roberts doesn’t hide the fact that she’s “obsessed” with fellow bandmate Kimberley Walsh’s behind.

When the girls vacationed together in Las Vegas for Cheryl Cole’s birthday, Nicola admitted her obsession.

Nicola said:

“The problem was, I was next to Kimberly and I’m obsessed with her bum. It’s a real issue.

“I was poking it. It’s so soft and spongey, I’d love to swap bodies with her. I’d like to be more curvy.”

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