Will Ferrell joins Billy for "Would Drew Barrymore Like That?" and "Scream for an American Girl Doll"; Billy heads to Madison Square Park for a game of "Jennifer Who?"

Will Ferrell and Billy ambush New Yorkers with Christmas presents, holiday trivia and Yuletide cheer! Plus, SNL star Rachel Dratch takes on a new obstacle course called "Leah Remini's Escape from Scientology!" Later, Billy plays "Gay, Part Black or Cokehead?" with a girl who looks exactly like Pixar's Brave. Other games include "For A Dollar" and "Who Discovered This Person, Judd Apatow or P. Diddy"