12/21/2010 at 04:00 PM EST
was a special guest at a pal's office holiday party at Patsy's in Manhattan. The starlet stopped by the group dinner and everyone was "having a great time," an onlooker says of the crowd, which enjoyed a buffet of classic Neapolitan food. Olsen also took home one of Patsy's cookbooks as a parting gift.
Parents-to-be Penélope Cruz
and hubby Javier Bardem
stepped out for a cozy dinner at the Counter in Studio City, Calif., together. On the menu? A turkey burger for the pregnant actress.
While in Sin City for her birthday celebration, Vanessa Hudgens
made time for sweets and friends. The newly single actress hung out with Ashley Tisdale
and Brittany Snow
at Serendipity 3 inside Caesars Palace, where the ladies dined on frozen hot chocolate, crab cake salads and a triple-decker grilled cheese sandwich.
Were they shopping for mom? Ben Affleck
, doing some last-minute Christmas shopping with daughters Violet and Seraphina at Williams-Sonoma in Santa Monica, Calif. Affleck held Seraphina with one arm and carried a large Williams-Sonoma shopping bag in the other as he exited the shop.
By VANESSA DIAZ and JENNIFER GARCIA