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?"

Nas and Ashley Benson join Billy; games Include: "Pretty or Liar", Media Mogul or Rabbi", and "Quizzed in the Face".

Billy is joined by Juliana Margulies for a brand new game called "That's Not Sia, It's Juliana Margulies!"

Billy welcomes Academy Award-winning actress Julianne Moore as they play a brand new game called "Hummus or Nipples?" Later, Billy is joined for "Quizzed in the Face" by everyone's favorite lifeline, Elena! Finally, Billy and Julianne Moore take to Times Square where Julianne ambushes innocent tourists with her acting ability. Other games include "For A Dollar" and "The Gospel Choir Lightning Round."

Nick Offerman joins Billy to play "Is This Adorable?", "Lana del Race for the Cure", "She's Talented or She Seems Nice?", "Missed Moments", and a special round of "For a Dollar."

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?".

Zachary Quinto and Julie Klausner join Billy; games Include: "Quizzed in the Face", "For a Dollar", "It Gets Better or Better Off Ted", "Billy"s Fashion Review", and "Its Spock! Do You Care?"

John Oliver joins Billy out on his street ventures. Billy asks gay people what they think about the famed English comic and host.

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

Anna Kendrick helps Billy find love on the street, and Elena is the lifeline in a game of "Quizzed in the Face." Other games include "What Does Katy Perry's Cat Care About?" and "For A Dollar."

Games include: Premiere of "Quizzed In the Face," "Get In the Snuggie" with Rachel Dratch, and "Amateur Speed Sketching"

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."

Talk-show host James Corden helps Billy appeal to the masses; Billy and actor Robin Lord Taylor ("Gotham") play an obstacle course called "Can You Separate the Art from the Artist?"; other games include "For a Dollar."

Billy and Jon Hamm take to the streets to find out if anyone will have a threesome with them! Later, Billy plays "Immigrant or Real American?" with Kevin the bisexual office manager.

Billy and Andy Samberg play the new game "Was at My Wedding or Possibly Killed Tupac?"; Billy and Andy introduce New Yorkers to some new superheroes; Kevin the busboy joins Billy to play "Fox News Anchor or Pilgrim?".

Billy is joined by Keegan-Michael Key for the game "Name 10 Gay People"; aspiring actor Cameron plays "Walking Dead or Talking Dead?"; Key competes in a new obstacle course; other games include "For A Dollar" and "Give It Up For Kate Hudson."

Games include: "Quizzed in the Face" with Special Guest Joan Rivers, and "Children's TV Show from the 80's or a Musician?"

P!nk joins Billy; games Include: "Who Dat?", "Quizzed in the Face", "For a Dollar", "Pink, Meryl Streep, or Who Cares?", "The Price feels so Right", and "This or Talk to Mario Lopez".

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"

Games include: "Where In the World Is Scarlett Johanson's Vagina?" and brings back "Sho Nuff Or No He Didn't".

Billy is joined by Aziz Ansari to play the brand new game "Is This a Kanye West Quote or Not?". Later, Rachel Dratch is back for an exhilarating obstacle course, "Escape Margot Robbie's Moment!"

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."

Billy welcomes Stephen Colbert to play "La La Land or Nicki Minaj", and Stephen heads out onto the streets to ask how New Yorkers feel about Donald Trump. Plus, Elena returns to answer Twitter questions.

Games include: "Quizzed In the Face," "Did You Hear Madonna Died?," and "Amateur Speed Sketching"

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".

Rashida Jones joins Billy on the street to play "Angry Turds" and a special edition of "Lightning Round"; Billy also plays "Black Eye Peas/Black Guy Who Peed" and "Dead or Boring?"

Games include: "Train song or mommy blog", "Chris Brown or Serial Killer" and "Quizzed in the Face".

In this week's star-studded episode, Billy takes to the street with movie icon Meg Ryan for a special Thanksgiving "For A Dollar" game. Plus, Lucy Liu plays a brand new game called "You're an A**hole Billy or Screw You Lucy Liu!" Finally, Billy celebrates the season with his very own Thanksgiving Parade co-hosted by Katie Couric! Other games include "For A Dollar" and "Mark Twain or Eddie Murphy?"

Billy hits the streets with Seth Rogen for a new segment called "Death Rogen". Later, just in time for Thanksgiving, Billy and Sarah play "What Does Michelle Rodriguez Bring to the Table?"

Mark Hoppus joins Billy; games include: "Quizzed In the Face," "Rapper or Nic Cage Character?," and "British Person or Scientologist?"

Andy Cohen takes the streets of New York with Billy for a special game of "New Year's Eve or Deformed"; Billy also plays "Where in the World is Rianna's Rihgina" and a special edition of "Lesbian Lightning Round."

Games include: "Are You Smarter Than a Gay Fifth Grader?," "Is This a Real Tyler The Creator Lyric or Not?"