A new season of "Cobra Kai" is out on Netflilx! Season 4 was released on December 31 and this season has a special appearance from Carrie Underwood. You can catch her performing at the 51st annual All-Valley Karate Championship as she sings the song, "The Moment of Truth." Check out a little sneak peak of Carrie's 'Cobra Kai' appearance in the video below.