Rita Ora did a fashionable walk of shame after Monday night’s Met Ball. Witnesses saw the singer and Vogue cover-girl on Tuesday afternoon in Barneys wearing the same dress — a white Thakoon gown slashed to the thigh — she’d worn to the gala and after-party. A spy said, “Rita was at Barneys the day after wearing the same clothes. She was in the elevator, wearing sunglasses, with some guy. She was trying to hide and getting annoyed that the elevator doors kept opening.” Her rep said, “I wasn’t there.”