National Christmas Day; actress Tamera Mowry-Housley ("Christmas Comes Twice"); actors Ben Savage and Mia Kirsher ("Love, Lights, and "Hanukkah"); chef Steven Hartsock and co-hostess Debbie Matenopoulos prepare BBQ meatloaf; Maria Provenzano prepares holiday cranberry meringue wreaths; designer Christina Stembel, Farmgirl Flowers founder, creates a living poinsettia tablescape; Bob Richter, vintage lifestyle expert, shows how to use vintage finds for holiday gifts; Ken Wingard makes a DIY "the Night Before Christmas" house; co-host Cameron Mathison presents holiday lights hacks;