Gaga plays hard to get at Met

SHE WANTS TO BE ALONE: Lady Gaga was slated to perform at Monday's Costume Institute Gala at the Metropolitan Museum of Art, but she refused to walk the red carpet and remained locked inside her dressing room for most of the evening, according to Page Six. "She literally wouldn't come out," said an attendee. "Friends tried, Lyor Cohen tried, no dice. Eventually, Vito Schnabel came over and got [artist] Terence Koh on the phone to talk to her, which helped. Koh and Oprah [who co-hosted] were the ones who finally coaxed her out." (5/5a)