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.” CASTING ABC‘s “The Disney Holiday Singalong” lineup has been announced, with BTS, Michael Bublé, Katy Perry, Julianne Hough, Derek Hough, […]