Kim Kardashian revealed her dramatic post-baby weight loss in black underwear and a see-through lace dress on The Tonight Show with Jay Leno on Wednesday night. Kim said the ‘ridiculous’ criticism she received for putting on the weight was incredibly painful. ‘I can honestly say it was the greatest challenge of my life,’ she said. And she confirmed reports she lost the weight on the Atkins Diet, adding ‘it worked for me’. See the results below!