The Hamptons party scene will sparkle night and day for the July Fourth holiday weekend. Tonight, East Hampton hot spot Georgica, which has never before opened on July 3, will host the first annual Voss Foundation Benefit with Sports Illustrated swimsuit model Ariel Meredith. Farther east, celebrity photographer Ben Watts will host his annual Shark Attack Sounds party on Friday at the Montauk Yacht Club. He’ll serve his newly launched WattsUp Rosé during DJ sets by Chelsea Leyland, Zen Freeman and Carl Kennedy. Expected guests include tall and gorgeous Alessandra Ambrosio and Dree Hemingway, plus Ben’s movie star sister, Naomi Watts. On Saturday another Montauk hot spot, Surf Lodge, will host CoverGirl’s Easy Breezy Summer Block Party with DJ Kiss and Samantha Ronson playing. If you’re stuck in the city watching fireworks over the Hudson River, nightlife doyenne Susanne Bartsch and Brandon Voss will host a July Fourth special installment of the weekly Catwalk party at Marquee, renamed “Indepen/dance,” with “living art installations” and costumed dancers.