Kim Kardashian defies gravity as she steps out without bra in transparent top

Socialite Kim Kardashian left little to the imagination when she stepped out without a brassiere in a transparent top in New York.

The reality TV star, who insists she has not had plastic surgery, was undeniably defying gravity as she stepped out in a sheer panel in her grey and black dress displaying more than a hint of her abundant cleavage, which showed no sign of sagging, reports the Daily Mail.

While admitting using Botox, the reality star has previously denied having undergone a breast job.

"Trust me honey, if I take this bra off you will tell me I need to get them done," she had said once.

But Kardashian's shapely figure showed the effects of her new exercise regime, having thrown herself into working out since Christmas.

While Kardashian braved the elements in her revealing dress, her sister covered up in a warm woollen coat complete with fur cuffs when they arrived for an interview on the David Letterman show tonight, to promote their new show Kim and Kourtney Take New York.