A handful of celebrities made their way to the A-List's Beverly Hills showroom in Los Angeles last night to celebrate 15 years of the PR firm, which was founded by Ashlee Margolis and represents brands like Forever21, Madewell, and Dannijo. Minnie Driver credited Margolis with introducing her to Parker, the brand she wore for the occasion. Besties Minka Kelly and Mandy Moore showed up in matching outfits (by mistake), and Moore copped to envying Kelly’s confidence.