Martha Stewart celebrates the holiday with guests Tony Bennett, Cyndi Lauper, Melissa Joan Hart, Lorraine Bracco and Ana Gasteyer. Bennett sings "White Christmas" and Lauper sings "Winter Wonderland." Also: Martha does a parody of Gasteyer (who parodies Stewart on "Saturday Night Live"); creates an ice-cream snowman with Bracco; and a sugar-cube house with Hart.