Eli Countryman In today’s TV news roundup, ABC announced that BTS, Michael Bublé, Katy Perry and more will feature in “The Disney Holiday Singalong,” and Netflix announced the premiere date date for Season 4 of “Big Mouth.”ABC‘s “The Disney Holiday Singalong” lineup has been announced, with BTS, Michael Bublé, Katy Perry, Julianne Hough, Derek Hough, Chloe x Halle, Adam Lambert, Andrea Bocelli, Pink, Kerry Washington, Hayley Erbert, Ciara and Leslie Odom Jr. taking part.