Overview:Comedian HOWIE MANDEL takes over as guest host and welcomes his friend MICHAEL BUBLÉ! The multiple-Grammy winner will chat about his family, being dubbed the “King of Christmas,” and divulge about the prank Howie pulled on him! A cappella superstars PENTATONIX will then take the stage to perform “I Just Called to Say I Love You” from their holiday album, “Evergreen.” And you’ll want to hear the inspiring story from fourth grade teacher K.D. Meucci, who created an online reading program called Bedtime Stories, in which she goes on Facebook Live and reads books to her students once a week. She’ll talk about how she underwent surgery to remove a brain tumor this past summer, but was still dedicated to read to her students — even from the hospital. Get your weekend started with Howie!