Nicole Richie The 'Fashion Star' Is a Bikini Babe

3/22/2012 10:15 AM PDT
Breaking News: Nicole Richie has curves!

While she used to get grilled for being morbidly thin back in her party girl days (right), Nicole proved she's all grown up and filled out in the right places by rockin' a sexy two-piece in Miami on Wednesday (left).

The 30-year-old mother-of-two "Fashion Star" mentor really is basking in the sun.