Guest Stars Megan Ferguson as Wendy Fineman-Walsh Grace Duah as Shan Barnes Katherine Reis as Pippa Sykes Ella Rubin as Bianca Breer Kathryn Gallagher as Heidi Bergmann Cole Doman as Rex Huntington Angelic Zambrana as Tati Gardinier Julie Halston as Sharon Kleinberg De'Laney Ortiz as Jamison Taylor Mac and the Holiday Sauce Band as Themselves Jonathan B. Wright as Klaus Wagner Ann Magnuson as Donna Calloway Co Starring Peter Grosz as Mr. Spencer Evangeline Johns as Old Woman Stephan Godleski as Delivery Man Marcus L. Brandon as St. Ann's Warehouse Security Maya Rosewood as Personal Shopper Stacey Van Gorder as Barrett Brier Jeanette Bonner as Payton Sykes Orna Guralnik as Herself (Dr. Orna Guralnik) Mikey Friedman as Enzo Jonathan Gomolka as St. Ann's Warehouse Clerk Machine Dazzle as Christmas Tree Uncredited Kristen Bell voices Gossip Girl
