<a class="link" rel="nofollow" target="_blank" href="http://www.popsugar.com/celebrity/Rachel-Antonoff-Knock-Knock-39498120"></a><p>POPSUGAR and ChapStick are teaming up to bring you a brand-new series, Knock Knock. Watch as designer Rachel Antonoff goes deep into the homes of today's most fascinating people . . . and goes through their stuff! See who opens the door starting February 2016.<br /></p>
