Simpson holds tight to son Bronx, 2, who sips on a smoothie in L.A. Plus: Robert Pattinson, Shia LaBeouf, Justin Bieber and more

6 of 16

RUNNING OF THE BRIDES

Kristin Cavallari continues to get her body into tip-top bridal form Tuesday in Chicago, where she'll be marrying NFL beau Jay Cutler next spring.