Wrapped in a puffy parka, Aniston hits the N.Y.C. set of her new comedy, The Baster. Plus: Gwen Stefani, Jennifer Lopez, Clay Aiken and more

PUSHING AHEAD

Gwen Stefani keeps 2-year-old son Kingston on the move – giving him a little push while enjoying an outing at Coldwater Canyon Park in Beverly Hills on Sunday. And the mother-son duo weren't alone: They were joined by daddy Gavin Rossdale (not pictured) and brother Zuma, 7 months.