American Celebrities Saint Tropez Nicole Richie Spread Pictures

On Thursday Nicole Richie hopped on a boat in St. Tropez and headed to Club 55, and the 31-year-old mother of two showed off her amazing abs (and legs...and arms) in daisy dukes and a blue cropped top. Those daily trips to the gym and all that green juice has definitely done her body good!

We're not sure where hubby Joel Madden or the couple's two darling kids were, but earlier in the day we spotted the skinny starlet in a fancier outfit (those Givenchy trousers certainly cost a pretty penny!) carrying a big bag from Le Dressing de Candice.

American Celebrities Saint Tropez Nicole Richie

Wonder what she bought?