Hudgens walked around barefoot in a bra-like top and fringed black skirt with jewelry piled around her neck, wrists and ankle.
Reality stars Kendall Jenner and Kylie Jenner hung out with celebrity offspring Willow and Jaden Smith while Ellie Goulding played on the main stage.
Actress Diane Kruger and actor boyfriend Joshua Jackson were spotted carrying multiple bottles of water onto the polo field at the event.
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The Sports Illustrated Swimwear Issue beauty and the Game of Thrones star play lovers in the new comedy and one intimate scene called on her to whip the actor - and he insisted she didn't hold back.
She tells WENN, "I said I didn't feel comfortable with the scene, but somebody (Coster-Waldau) said that he was totally down for the scene."
He adds, "Absolutely. I was fine with it. I thought she did a terrific job. I...