Today, the “It” Bag seems like a retro concept. Just don’t tell that to Givenchy’s Riccardo Tisci. His Pandora Messenger bag is the tote du jour in Hollywood, with a high-visibility following among the chic celeb set. Reese Witherspoon, Kate Beckinsale and Liv Tyler are among those recently photographed, Pandora in tow. Clean-lined yet comfortably slouchy, the bag features two gold zip closures, an exterior ID pocket and cross-body strap, all melding into utilitarian appeal.