Monday's Highlights: 'Sundays at Tiffanys' on Lifetime
BIG GIRL NOW: Eric Winter and Alyssa Milano star in a TV new movie, “Sundays at Tiffanys,” about a bride-to-be who is visited by her now-grown imaginary best friend, at 9 p.m. on Lifetime.
The Sing-Off: The 10 a cappella groups perform in the season premiere of this unscripted competition series (8 p.m. NBC).
Cake Boss: Next Great Baker: Competitors must create a celebration cake that shows their skills as bakers and decorators in this new unscripted series (9 p.m. TLC).
Anthony Bourdain: No Reservations: Anthony and Michael Ruhlman plan to throw a potluck dinner, but they wind up in a Chinese restaurant in a holiday episode of the unscripted series (10 p.m. Travel).
American Country Awards: Trace Adkins hosts and performs during this new special, which honors performers selected by fans (8 p.m. Fox).
Martha Stewart's Holiday Open House: Martha, who considers Christmas the most meaningful day of the year, opens her Maple Avenue home to demonstrate holiday craft and culinary and decorating ideas in this new special (8 p.m. Hallmark).
Mad Hungry: Home For The Holidays: In her a new holiday special, Lucinda Scala Quinn reveals her most festive meals for the holiday table (9 p.m. Hallmark).
Sundays at Tiffany's: Alyssa Milano stars in this TV new movie adaptation of James Patterson's romance (9 p.m. Lifetime).
Football: The New York Jets visit the New England Patriots (5:30 p.m. ESPN).
Pro basketball: The Sacramento Kings visit the Clippers (7:30 p.m. FS Prime).
Photo: Ben Mark Holzberg / Lifetime