Crafting the ultimate it girl: how KT Tunstall reincarnated Cher Horowitz for Clueless The Musical

Suddenly, she sees. Twenty years ago, KT Tunstall went stratospheric as she sung on The Devil Wears Prada. Now, she tells Tatler how she's written songs for Cher Horowitz in Clueless The Musical – and offers an exclusive look at musical's smash-hit opening song, ‘Perfect’