Victoria Beckham may be known for her refined—or, dare we say, posh—style, but that doesn’t mean she still can’t let loose now and then. And this week, during a trip to New York City, she did just that. First up was a rager at Lower East Side hotspot The Flower Shop, where she celebrated the release of her new Reebok x Victoria Beckham collection with husband David Beckham, son Brooklyn and his new girlfriend Hana Cross, and Justin Theroux, among others. Next up was a private dinner at the Frick Collection to fete Sotheby’s newest exhibition. Also this week, Anne Hathaway attended the premiere of Serenity, and Rita Ora hosted a shopping event for her new collection with Giuseppe Zanotti. Here, the best party pictures of the week.