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

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".

Billy plays "Make That Noise" with SNL and 'Trainwreck' star Bill Hader. Later, Billy plays "Amateur Speed Sketching" with Andy the film editor. Finally, Amy Sedaris joins Billy in one of the biggest obstacle courses the show has ever seen, Shondaland! Other games include "For A Dollar" and "Streaming or Screaming?".

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"

Sarah Jessica Parker joins Billy to give out shoes to anyone who can show their true appreciation for her work. Later, Billy plays "Kevin Hart or Gabby Giffords?" with plus-size musician, Tina! Finally, Sarah Jessica Parker plays "Santa's Reindeer or Sex App?" and wins a very unique prize.

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."

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."

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

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.

Billy is joined for the first time by a child actor, the star of "Room," Jacob Tremblay. Together, Jacob and Billy take to the street for a brand new "Lightning Round."

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."

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?"

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 introduces shocked New Yorkers to Jurassic World and Guardians of the Galaxy star, Chris Pratt! Plus, Billy finds out if Chris Pratt will be the next Indiana Jones and while playing "For A Dollar" offers random strangers on the street money if they relate to Ben Stiller!

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."

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?"

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."

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?"

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."

Rachel Dratch joins Billy; games Include: "Julia Roberts-Themed Obstacle Course", "Would you Masturbate To Them?", and "Weekend at Bernies or Django Unchained".

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

Rashida Jones and Maya Rudolph join Billy; games Include: "Their Bodies, Themselves", "Tyler Perry Movie Quote or Applebees"

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."