The New York Academy of Arts was done up in jellyfish chandeliers, coral centerpieces, and ombre pink and purple wreaths of flowers last night in honor of its annual Tribeca Ball. The theme? “Far Horizons.” The guests? Art aficionados including Marina Abramovic, Naomi Watts, Brooke Shields, and — briefly — Vera Wang and Swizz Beatz clustered in the entry way making eager conversation. (Al Pacino darted in just before dinner, bypassing the step-and-repeat entirely.) Eileen Guggenheim extended a hand to Swizz — “Are you a collector?” she asked. Abramovic quickly retreated to one of the upper floors, where the remaining attendees perused Academy students’ works. Stilt-walkers roamed the floor in winged, glittering ensembles. “I really don’t like looking at the art with everyone, with drinks in their hands,” Abramovic said. She apparently did not appreciate the stilt walkers or the roaming accordionist playing The Beatles. “Performance is serious business, and here they use it as entertainment,” she added. “I spent 45 years of my life against that.” But it was time for dinner, and she was running late.