Kate Moss was back in party mode last night for a late one out at London's Groucho Club. She kicked things off at the private club Annabel's, where Lady Gaga performed a surprise show for a crowd that also included Florence Welch of Florence and the Machine as well as Geri Halliwell. Kate has been enjoying a few low-key weeks around her home, with pub lunches and business meetings occupying her days. The supermodel Vogue Paris cover star is also prepping for her rumored Summer wedding. She may first, though, have a trip to Paris in the works. She's the focus of a new exhibition opening at France's Gallerie de L'Instant, which features images spanning Kate's long career. Photos of Kate are also currently on display at NYC's Danzinger Projects.