Best keep the kiddies out the room. Miley Cyrus wasn't just shirtless in her cheeky Santa getup today. She was also braless and provocatively grabbing her chest. The 28-year-old singer drove her 117 million Instagram followers right to singer Billy Idol's page today, with the "Midnight Sky" singer alerting fans to her appearance on his "Live Transmission" Christmas Show. Miley, fresh from the release of her "Plastic Hearts" album, took a break from the promo to get festive. She kept it naughty, though. Check it out below.