Popsugar Fashion Michelle Obama Michelle Obama Style 2015 The 23 Best Outfits Michelle Obama Wore This Year December 27, 2015 by Aemilia Madden View On One Page Photo 21 of 23 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 21 Dressed in Zac Posen Dressed in an off-the-shoulder Zac Posen dress, the first lady brought the heat at BET's Black Girls Rock! event in March. Previous Next Start Slideshow Michelle ObamaRed CarpetBest Of 2015Celebrity Street Style