Helena Christensen and Kate Bosworth
03/28/2008 AT 06:00 AM EDT
, mixing with a star-studded
crowd (including Mary-Kate Olsen
and Clive Owen
during a Calvin Klein sponsored bash at New York's Mercer Kitchen following a screening of her
The actress was happy to hang out with Helena
as revelers feasted on salmon, French fries and lots of cookies and pastries in the underground restaurant. Meanwhile, Olsen stayed deep in conversation with friend Derek Blasberg
– tucked away in the back – and 21
star Jim Sturgess
stuck close with his girlfriend, Mickey O'Brien. Later, the crowd moved to Submercer, a tiny subterranean bar that guests could enter from inside the restaurant – continuing the celebrations late into the night.
, spending an afternoon with
three friends, taking the backlot tram tour at Universal Studios Hollywood.
casually checking out art with a male friend
at the Armory Show preview party in New York. Also there (separately): Matt Dillon
, discussing specific pieces with dealers and looking very
intense as he checked out the art.
Adrien Brody and Elsa Pataky
Ronald Asadorian / Splash
, Courteney Cox Arquette
, Eva Longoria Parker
, chatting over chips and guacamole in an
upstairs VIP booth at a party in Hollywood to raise awareness for the
Epidermolysis Bullosa Medical Research Foundation.
Meanwhile, downstairs at Longoria Parker's new restaurant Beso: Host Ken Paves caught up with clients Jessica
and Ashlee Simpson
over pizza in the booth they shared with pals CaCee Cobb
and boyfriend Donald Faison.
And nearby, Kate Beckinsale
and director husband Len Wiseman
shared their booth with Rose McGowan
and her director fiancé Robert Rodriguez.
By LISA INGRASSIA, MARISA LAUDADIO, MELISSA LIEBLING-GOLDBERG and
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