The singer happily gives her 21-month-old little guy a lift while out in Los Angeles on Saturday. Plus: Brad & Angelina, Reese Witherspoon, Miley, Taylor & Katie and more

WELCOMING COMMITTEE

With her studded Alexander Wang bag, Mary-Kate Olsen makes a fashionable appearance Thursday at New York City's Saks Fifth Avenue, to represent her line Elizabeth and James at the opening of the store's new fifth-floor Contemporary space.