Last Night's Parties: Gwen Stefani, Jessica Alba & Beyonce All Make Appearances At The Global Citizen Festival & More!

Over the weekend in NYC, A-list actors and musicians made their way to Central Park for the Global Citizen Festival, where Beyonce made a surprise appearance alongside Jay-Z, Hilary Duff celebrated her 27th birthday with Pitbull at the T.J. Martell Foundation's 15th Annual Family Day, fashionistas hit up the NYC Big Flea Antiques Market, and more! Click through for all the details.

[Meredith Melling, Susan Joy by Max Lakner/BFAnyc.com] [Beyonce via @mrs_yonce.carter]

Mario Batali Fab Five Freddy Jamie Korey Meredith Melling Burke Christina Juarez Advanced Style Ari Cohen Eric Villency Lucia Tait Hilary Duff Aimee Ruby Ali Wise John Forte Carla Hall Morgan Spurlock swizz beatz Conor Harrington Wendy Goodman Gregory Long Alexandra Pappas Dj D-Nice Natalie Kaplan Danny Simmons Samsung Galaxy Wendy Fisher Susan Joy Lauren Lucas Alise Shoemaker Whitney Wolfe Derrick Adams Ambre Kelly Andrew Gori Annie Novak Dee Dee Sides Sam Allen David Eisenbach Todd James Sarah Lewis Arielle Patrick Hank Willis Thomas Jhene Aiko Rose Thorn Susi Cahn Isolde Brielmaier Annie Lansing Jeffrey Caldwell Andrea Greeven Douzet Kevin Michael Barba Isaac Ross Caroline Villency Bradley Theodore Lauren Taylor NYC Big Flea Antiques Market Hilary Duff Celebrates Her Birthday At The T.J. Martell Foundation's 15th Annual Family Day Global Citizen Festival 2014 Christian Simons Jillian Hearst Jean Meyer Brandon Shainfeld Carolina de Neufville Cleone Pory Deborah Shainfield Maddie Haddon Brendon Mahr Frank Debiasi Len Morgan Nathan Ploener Afrodet Zuri Alanna Bunte Alec Batis Ali Ross Beth Felsen Brian Satz Camille Purdy Chris Coady Clio Collins Devin Powell Joshua Greene Mauricio Rodriguez Michael Beneville Lazarides And Conor Harrington Present Eat And Delete NYC Olivia Wong Meaghen Stark Steve Lazarides Tanija Gobin Ella Weston Killian Kieran Ian Cox Michelle Papillion Steven Lazarides Tanley Wong Aaron Barr Al Maser Anastasia Veron Charlotte Peters Daze Ellis Elizabeth Chait Harriot Vernon Jason Sukhram