FAMILY TIES: It was a family affair at Margherita Missoni’s birthday bash at home in Milan Sunday night. Grandmother and founder of the Missoni label Rosita Missoni greeted guests, saying: “Welcome and make yourself at home.” Margherita Missoni held court dressed, naturally, in Missoni as guests donned Afro wigs for what was a polka dot/Jamaican-themed fete. “It was my birthday on the 22nd,” said Missoni, who is heading to Paris for fashion week. “I have just come from the Roberto Cavalli dinner, where there was Ronnie Wood, Courtney Love and Lindsay Lohan,” said actress Meredith Ostrom, who sparkled in a green sequin Cavalli cocktail dress. “I am heading back to London to finish filming ‘Men Don’t Lie’ with Michael Madsen,” added Ostrom. Other guests included Allegra and Francesca Versace, Mario Testino and shoe designer Giuseppe Zanotti.