Last night Jessica Simpson showed off her Spring 2011 denim line on her closest friends and family! The show featured 12 of her girlfriends strutting their stuff in Jessica Simpson Collection looks including denim dresses, cuffed shorts and sleek skinnies. The event was DJ'ed by brother-in-law Pete Wentz, and we also spied Simpson's new boyfriend Eric Johnson there! "Everyone wears denim," Simpson told us. "It's amazing to have denim for every size and personality. Like my sister, she'd never wear a denim shirt, but when she paired it with a ruffled mini, she totally rocked it up a bit." The celebrity designer took a natural approach, dressing her friends in looks that fit their personal style best. "My look is very...girl-next door, plus my favorite color is yellow," BFF CaCee Cobb said of her sweet bustier. And sister Ashlee loves her Jessica Simpson shoes--"I wear them all the time!" she told us of her platforms. Want to see all of the night's best looks? Click through our gallery now, then visit Designer Central to see the whole collection!