0524_best_launch The stars looked super chic this week!

Jessica Chastain looked beyond beautiful in a flowy, floor-length, lavender Elie Saab gown at the "Foxcatcher" premiere during the 67th Annual Cannes Film Festival in France on Wednesday. The "Zero Dark Thirty" star paired her glamorous Grecian-style gown with dangling silver earrings and silver Roger Vivier cage heels. To complete her elegant ensemble, the strawberry-blonde beauty wore her luscious locks down with loose waves and topped off her lovely look with amethyst eye shadow and a soft-pink lip.

Heidi Klum sizzled in an embellished, one-shouldered, ice-blue Atelier Versace dress with cut-out detailing at the bodice and a thigh-high slit at the amfAR Cinema Against AIDS Gala on Thursday in France. The former Victoria’s Secret model accessorized her sexy frock with silver jewelry and strappy silver sandals. She styled her hair in an elegant old-Hollywood inspired ‘do and kept her makeup looking naturally radiant with soft shimmery eye shadow and glossy pink lips.

Rosie Huntington-Whiteley looked like a ray of sunshine in a backless, bright-yellow, asymmetrical Emilio Pucci dress with modest waist cut-outs and chain-detailing at the amfAR Cinema Against AIDS gala in France on Thursday. The model-turned-actress was glowing in her golden gown, which she paired with a bronze Jimmy Choo clutch, black Jimmy Choo heels and gold Bulgari jewelry. To complete her stunning ensemble, the "Transformers 3" star styled her beautiful blonde tresses with loose curls and emphasized her best features with bronze eye makeup and glossy pink lips.

Click "Launch Gallery" above to see more chic celebs from this week -- including Miranda Kerr, Cara Delevingne and Jennifer Lopez!

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