By Rita Kokshanian
Updated Nov 29, 2014 @ 5:00 pm
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Giampaolo Sgura

InStyle's Instagram is about to get a serious dose of cool. Ariana Grande, our December cover girl, is taking over our account this Sunday, and we can't wait! The star will be sharing behind-the-scenes photos from her InStyle cover shoot.

Grande, who has over 20 million followers on her own Instagram account, is no novice when it comes to the photo sharing site, so expect some amazing snaps! Make sure you don't miss a single 'gram—follow @instylemagazine on Instagram to see all the photos that Grande shares tomorrow, Sunday, Nov. 30!