Sure, there might be a whole bunch of celebrities dressed up in cool costumes for Halloween right now, but how many of them are actually singing in those ensembles? Enter: Kelly Clarkson. The noted cover maestro kicked off the spooky holiday weekend by posting her newest a cappella cover, Sia’s “Chandelier,” to her Facebook page while donning the singer’s signature blonde wig. (“I don’t know how she does this cause you know, you can’t see,” Clarkson mused. “But it’s also kinda awesome cause you’re in your own little world when you’re performing!”) Sia’s a belter, Clarkson’s a belter, so you know this is going to be good.