Julia Roberts has gone into mommy-hiding lately (as would we, if we were a celebrity with 3 toddlers and a ranch in New Mexico), but next May, she's coming back to the spotlight. The actress will host the spectacular Costume Institute Ball with George Clooney and Georgio Armani in May, and the event's other co-chair is Anna Wintour. When Sienna Miller hosted the Met's Anglomania ball, she landed on Vogue's cover soon after, and last year it was Cate Blanchett, who received similar style treatment in the wake of her appearance. Does this mean we'll see Julia Roberts on the May issue of Vogue? Maybe... she's got a new film, Fireflies In the Garden, set for a Spring '08 release, so the timing could be perfect.