Kaley Cuoco's engagement; Selena Gomez's inspired story; Chrissy Teigen retro birthday celebration; backstage with Taylor Swift; Meghan Markle's first appearance since her engagement; Carol Burnett shares stories from her TV show days; Kelly Clarkson; Alison Sweeney's holiday movie magic on "Christmas at Holly Lodge"; rushed look for a replacement for Matt Lauer on "Today";—anonymous