Kim and Kourtney Kardashian have launched their new clothing range for Dorothy Perkins.
The Kardashian Kollection was a joint effort by Kim and Kourtney with sister Khloe, who was unable to attend because of filming commitments in the US version of The X Factor.
Kim - who wore a black sequinned mini-dress for the launch - said her famous boyfriend Kanye West has been supportive of her latest business venture.
"He likes the way I dress," she added.
Kim also confessed that she suffers from the occasional wardrobe malfunction.
Love my Kardashian Kollection dress I got today at Dorothy Perkins! http://t.co/0cQ9CtRn
We love you, London town! http://t.co/tDCSVDHH
Thank u topshop and Dorothy Perkins for a lovely night! The Kardashian collection is stunning and timeless!! http://t.co/LnkG0CZW
She said: "I look back at things from really recently and I'm like, 'Oh my God, why did I wear that, what was I thinking?'
"But it's fun. You see what you like and what you don't and experiment."
Mum-of-two Kourtney also praised British women's "individual style".
She said: "It's not like matchy-matchy, everyone in the same thing, it's very different."
The curvaceous socialite and her sister Kourtney, joined retail mogul Sir Philip Green to promote the range at Dorothy Perkins.
X Factor contestants Jahmene Douglas, Rylan Clarke, James Arthur, District 3 (minus bandmate Michael Parsons) and Ella Henderson also attended the bash.