Oohing and aahing over summery couture and statement jewels at the annual French film fest Anna Kendrick Between Kirsten Dunst’s ’50s-style lemony day dress, Amal Clooney’s floaty Versace buttercup gown, and Jessica Chastain’s goldenrod Jessica Rabbit–style Armani number, yellow was the clear red-carpet winner at this year’s Cannes Film Festival. Add one more to that list: Kendrick’s marigold Stella McCartney gown, which she wore with white-hot Bulgari diamonds. ON KENDRICK (Inset) Divas’ Dream necklace in 18k white gold with diamonds; $82,000; Bulgari, NYC; 800-BULGARI; bulgari.com     UNDER $20,000 Ventaglio pendant in 18k gold with 3.96 cts. t.w. diamonds; $16,000; Miseno, Matawan, N.J.; 732-689-2340; misenousa.com     UNDER $500 Fringe drop necklace in sterling silver; $200; Anna Beck, West Hollywood, Calif.; 3