Tilda Swinton, AKA fashion icon, turned up to support Luann de Lesseps’ in concert. She was performing her cabaret show when she was shocked to see the “full-on A-list celebrity” in attendance. Luann de Lesseps first met Swinton, 63, at one of her recent Countess Luann cabaret shows in London. According to de Lesseps, Swinton then invited her to Scotland for the night, which she accepted. Tilda Swinton enjoys Luann’s showTilda Swinton was invited to the Scotland gig of Luann de Lesseps’ cabaret show, Marry F Kill!, after first attending her London event. Luannh had already found out she was at…