Khloe Kardashian hates being compared to her sisters.

While Khloe, 29, has recently slimmed down and has been referred to as ''the hot sister'', she insists it is not a compliment if it comes at the expense of her siblings Kim, who is pregnant with her first child, and mother-of-two Kourtney.

Khloe wrote on Twitter: ''I am sorry but I do not find it a compliment when I am told I am 'the hot sister'. I appreciate the compliment but this is NOT a competition.

''We are sisters and women need to stop being compared to other women! Beauty is not how we look, it is how we act (sic).''

Before Khloe lost weight earlier this year she was constantly compared to her petite sisters and admitted that was difficult.

She said: ''''I probably thought I was prettier before I entered the spotlight because being compared to somebody else every day does sort of beat up your spirit and soul.

''After my father died [in 2003], I gained a lot of weight, and then I was in the spotlight. I was quickly blasted for not being a cookie-cutter sister like Kourtney and Kim.

''I understand why so many people in this industry have eating disorders or want plastic surgery, and I'm proud I've done things the healthy way.''