Demi Lovato headed out to Glendale's Barnes & Noble last night not to make post-holiday gift returns, but to commemorate her latest Seventeen magazine cover. "My fans were AMAZING tonight!!! Thanks to all who came out. And special thanks to @seventeenmag for having me on their cover!!!!," the pop star excitedly tweeted following her in-store fiesta. For the occasion, the Unbroken songbird sported a similar boho ensemble as seen in her spread for the mag's February issue: a flowy white lace dress paired with a black jacket. Check out Demi's midweek-chic look and tell us if you're as excited as the ravishing red head for her issue to hit newsstands next week.