Alyson Hannigan

Alyson Hannigan must have spritzed herself with Love Potion Number 9 before hitting In Style’s Stuck in L.A. party, ’cause we’ve got it bad for the black-clad babe.

The mahogany locks and tiered cocktail frock from Alberta Ferretti give her a perfectly polished, city-girl look, while the knee-high Chloé boots suggest that beneath this stylish veneer is a gal who just wants to have fun. Count us in!