Katy Perry Tweeted THIS photo from American Idol.
Her dress is the Alexander McQueen Belted double-breasted leather midi dress. Buy it here: NEIMAN MARCUS, MATCHES FASHION, and NET-A-PORTER
Her earrings are the Burberry Big Key Disc Earrings. Buy them here: LUISAVIAROMA
Her shoes are the Bottega Veneta Stretch Sandals. Buy them here: BOTTEGA VENETA, FARFETCH, FORWARD, MATCHES FASHION, and MYTHERESA
Get the look for less here: