Katy Perry Instagrammed THIS VIDEO announcing that season 21 of American Idol is premiering on February 19th.

Buy the exact same outfit that Katie is wearing here:
Her dress is the New Arrivals Fringe Sequin Mini Dress. Buy it here: MODA OPERANDI
Her necklace is the Swarovski Millenia Necklace. Buy it here: SWAROVSKI
Her shoes are the Amina Muaddi Tina Metallic Crystal Charm Ankle-Wrap Sandals. Buy them here: BERGDORF GOODMAN, FWRD, INTERMIX, MATCHES FASHION, NEIMAN MARCUS, NET-A-PORTER, NORDSTROM, and SAKS FIFTH AVENUE
Get the look for less here:
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