Kelly Clarkson pulled out all the stops as she covered "I Put a Spell on You" during her show on Thursday. For the special Halloween episode, the singer dressed as Winifred Sanderson from Hocus Pocus as she performed the spooky hit. And let's just say, it was frightfully good. Not only did she don the witch's signature red hair, but Clarkson hit all the right notes as she walked around the stage with backup singers dressed as Sarah and Mary Sanderson. This just might be our favorite "Kellyoke" segment yet. Get into the Halloween spirit with Clarkson's full performance above.