Last night we joined Gaga fans and fashion enthusiasts at the opening of Lady Gaga's Workshop at Barneys in NYC. Wearing a custom-made white tweed dress by Karl Lagerfeld for Chanel, Gaga unveiled her 5,500-square-foot Workshop housing everything from Gaga-inspired sweet treats to accessories to even things for your home (hello, pearl-encrusted teacup!). As a guest in the store, you feel more like you've landed in Willy Wonka's factory — albeit with Gaga's signature flair — than a floor at Barneys. With rainbow-bright hues, technicolor sculptures, and candy displays, the place feels almost like Wonderland where we could have spent hours marveling at Gaga's collection and shopping the night away. That's just what celeb guests like Blake Lively, Brad Goreski, and Prabal Gurung did, making their way around the workshop and sipping cocktails at Lady Gaga's grand opening. We caught up with Blake, who aside from picking up a few Gaga goodies, revealed other items on her holiday wish list: "I've been going a little Chanel-crazy lately. Also Brunello Cucinelli, I just love his sweaters and his jackets — that's been my Fall splurge." Want to see more? Just step inside for a glimpse of Gaga's world, then head to Barneys NYC to see it for yourself and shop online to score your own Lady Gaga gifts.