Parties! The style, stars and scoop from Hollywood's hottest events

Alyson Hannigan was summer-appropriate in a vintage Louis Vuitton find from DecadesTwo, but the How I Married Your Mother star was easily seduced by some winter-wear. "There's a Balenciaga leather jacket that I'm about to show my friend. It's an outrageous thing to buy when you live in L.A.—unless I had a Harley Davidson and was going to go ride it at midnight in December I'd never wear it!" Hannigan joked. "But it's gorgeous. I love it."