Dr. Natalie Azar; John Cena (Sisters (2015) and Daddy's Home (2015)). Also: "Winter Tune-Up"; "Hassle-Free Holiday"; "Today Food"; life-lengthening health advances; hacks for taking down your Christmas tree; pop culture moments of 2015; out the door in 30 seconds; sweat-free slim downs; "Favorite Things"; festive sleepover ideas for kids.—anonymous