Olivia Wilde takes on NYC with Billy for "Olivia Wilde is Very Pretty". Other games include "Humpty Dumpty or Mary J. Blige?" and "You Can't Do That on TV: Adele Edition."

Lena Dunham joins Billy; games Include "Steve Harvey or Harvey Milk", "HBO Girls or Berenstain Bears", "Tyler Perry or Art", "Screaming Tweets", and a special round of "Cash Cow".

Billy and Neil Patrick Harris play a round of "How I Met Your Mother: Lightning Round" and "Racist or Vegetarian?"; Lindsay Lohan joins Billy for "How I Destroyed Your Mother."

Billy is joined by Seth Meyers and play ` Would Lena Dunham F*** That Cartoon Character'? Billy hits the streets and plays `The Vaginal Four'.

Paul Rudd and Amy Poehler join Billy; Games Include "Would You Have Sex With Paul Rudd?", "Clueless or Childless" and "Would This Disappoint Bill Cosby?", For a Dollar, and "Where Does This Stephen King Novel Take Place?".

Joel McHale hits the streets with Billy to play the "Mo'lympics"; Billy plays "Easter Bunny Lightning Round" and "Buzz Feed List or Schindler's List."

Amy Poehler joins Billy for a round of "That's Not Pitbull, It's Amy Poehler!" and "Chipmunk or Huxtable"; Billy plays "Hope for Haiti or Jumanji."

Billy and Patton Oswalt team up to play "Does Shakira Know About This?"; Billy plays "Queen Latifah or Brave Person?," "Thanks for Sharing, Adam Levine" and "Meryl-Go-Round."

Sean Hayes joins Billy to play "Uninterested or Uncircumcised?" and "Who's the Most Famous Person on Sean Hayes' Phone?"; Olivia Wilde returns to play "John Mayer or Pepé Le Pew?," and Billy plays "Actress Potato Head."