This week New York saw its first burst of true spring weather, and the city’s parties were accordingly awash with bare legs and festive florals: Alan Cumming — currently riding out his Cabaret resurgence — wore a crown of fresh flowers to the New York Academy of Art’s Tribeca Ball, and Martha Stewart attended the Laduree and Faberge luncheon sporting a seasonal floral brooch. Vogue hosted a screening of the David Hare film, Turks and Caicos, featuring Winona Ryder, who showed up wearing a Saint Laurent blazer and cream-colored gown, practically glowing as she chatted away with Anna Wintour. In L.A., Lupita Nyong’o, Kate Mara, and Elle Fanning compared their Marie Claire covers, while back on the East Coast, everyone from Mickey Boardman to Joseph Altuzarra showed up to support Jeffrey Fashion Cares at the Armory. Click through our slideshow for these and more highlights from this week’s party circuit.