Los Angeles, Sep 24 (IANS): Rapper Kanye West is said to have urged girlfriend Kim Kardashian to lose weight.

West thinks his friend singer Beyonce, who gave birth to her first child Blue Ivy January last year, has a better body than Kim.

"He even suggested Kim drop 20 pounds, arguing that Beyonce has a similar shape and she proved you can get that supermodel body using her lemon juice, cayenne pepper and maple syrup diet," contactmusic.com quoted a source as saying.

"He says he wants her to be the face of his clothing line but to do that she has to fit into the clothes. It's really uncomfortable, her shape is what made her name," the source added.

West, 35, recently got Kim to ditch her trashy style and start taking fashion tips from Britain's Duchess of Cambridge after buying her an entire new wardrobe of more conservative designer clothes.

"Kanye has been urging Kim to tone down her make-up and style her hair in a more conservative style, like Kate," said a source.