Forget an ugly sweater Christmas party. Have a Christmas pajama party to show off this awesome Christmas union suit that lights up when it detects motion. That’s right. This Christmas tree onesie has motion detectors which make the star and lights sparkle when it senses movement. Everyone at your Christmas party will be ranting and raving about your cool new pajamas. Don’t let the tradition of goofy onesies fade. Get these pajamas now because there is nothing attractive about ugly sweaters.