Sexy mama! Nicole Richie certainly has come a long way since her pre-The Simple Life days. Here, she shows off her post-baby bod in this stunning vintage Yves Saint Laurent dress at the 2008 UNICEF Snowflake Lighting in Beverly Hills.

To accent her neckline, she features a necklace from her new jewelry line, House of Harlow 1960. To recreate this look, try this Mojo Dress by Lauren Conrad, and these sapphire earrings:

Personally, I think Nicole could have added a bling-ing ring (an engagement ring perhaps?) for some dramatic effect, but perhaps she wisely chose this moment to spotlight her own creation. She radiates business-savvy, fashion-oriented, and philanthropic…all, with just one pose!