The Kardashian sisters stepped out last night in their tightest dresses to celebrated the release of Beach Bunny Swimwear. Kim, Kourtney, and Khloe hit up Robertson Boulevard for the Grand Opening Party at the Beach Bunny Swimwear store. Earlier in the day paparazzi spotted Kim K. shopping for her outfit, while Kourtney tweeted 'Heading 2 beach bunny store opening.Wearing 1of the fab dresses from our kardashian 4 bebe summer collection!Its white and screams summer.' Kim tweeted 'I'm eating a brownie. Is it worth it though?' - judging by the way her dress fit it was definitely worth it. Check out the photos!