Paltrow and her pal Tyler stay close at a screening of Iron Man in New York City. Plus: Hilary & Haylie, Lindsay & Samantha, Eva Longoria Parker and more

DOUBLE DUFF

Hilary Duff enjoys some sisterly support Monday as Haylie joins her at the New York premiere of War, Inc. at the Tribeca Film Festival. In the satire, Duff plays an Eastern European pop star – Yonica Babyyeah – and tells PEOPLE of the role: "I had to sing off-key . . . But the accent made it easy."