Kim Kardashian used to "wish" she looked like her sister Kourtney Kardashian.

The 30-year-old socialite - who is known for her womanly curves - is proud of her figure, but grew up wishing she was as petite as her older sister.

She said: "Kourtney and I are around the same age but I developed quicker and was curvier than her. There was never any weird competition, but there was just me wishing I looked a bit more like Kourtney."

Kim has had a busy few days as she celebrated reaching the landmark age on Thursday (21.10.10) with numerous parties, celebrations and evenings out with pals.

However, the pretty reality TV star has vowed her life will change now she has hit 30, and she has promised never to pose nude again like she did in a recent bare-all shoot for W magazine.

She added: "I'm too old for that now... I wanted to get it all out of my system before I turned 30."