Blair and 5-month-old son Arthur laugh it up in Beverly Hills. Plus: Russell Brand, Rihanna, Katy Perry and more
Updated: Tuesday Jan 17, 2012 | 05:00 PM EST
More from PEOPLE
See More News
6 of 16
My how you've grown! A very pregnant Jessica Simpson rubs her belly as she arrives at LAX on Monday.
Copyright © 2013 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.
In partnership with AOL