Oh. My. Gaga. 🎭 With four costume changes, Lady Gaga ( @ladygaga ) camps it up big time as one of the most buzzed-about guests at the #MetGala. The event hosted by Vogue ( @voguemagazine ) is held annually on the first Monday of May with the Metropolitan Museum of Art’s Costume Institute ( @metcostumeinstitute ) in New York City. Check out our story to see how “Riverdale” star Charles Melton ( @melton ) prepped for the big night. ✨And.... spoiler alert: some of his famous friends stop by for a cameo! Video of @ladygaga by @bardiazeinali