The episode of The Kelly Clarkson show with Gwen, Blake, John, and Carson as guests will be airing on Thursday, 11/21. Melinda Rodriguez from Team Kelly this season will also be appearing on the show, Brooke Stephenson tagged along with her, but it doesn't seem like she's going to be a guest on the show. Kelly does a cover song at the beginning of each episode and the song title is usually specified in the episode description of the show, but this episode it said it was a surprise which makes me think it might either involve the other coaches or former Voice contestants. That's just a guess though.