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
- Read the Cover Story: The Gosselins 10 Years Later: 'So Much Has Changed'
- Diane Kruger Gives C.J. Parker a Run for Her Money in Red One-Piece Swimsuit
- Stanford Sexual Assault Convict Brock Turner to Be Released From Jail on Friday