The star of the film Elf, Will Ferrell, returns to Billy on the Street for a very special holiday lightning round! Watch how New Yorkers react when Will and Billy demand holiday cheer!

Santa has his hands full right now, so talk show host Jimmy Kimmel is helping him figure out which children belong on the naughty list by hooking them up to a fake lie detector.

To help prepare the First Lady for life after the White House, Ellen took her to CVS Pharmacy to pick up a few things.

The male characters of the hit TV series How I Met Your Mother are constantly helping each other get into and out of situations. The book Bro on the Go contains the code of honor necessary for maintaining such friendships.

Barney never fails to impress the group with the lengths he'll go in order to get a woman interested in him.

Watch Academy Award winner Julianne Moore ambush innocent tourists with her acting ability in the hopes of making some tip money in Times Square! Forget Elmo, Spiderman and the other random characters tourists take pictures with in New York, this is Julianne Moore!

In this week's Lightning Round, Neil Patrick Harris and Billy Eichner take to the streets to find out how New Yorkers feel about the end of the series How I Met Your Mother.

Jimmy Fallon can't believe he's at the White House on the Fourth of July. Watch part of his stand-up performance from that evening in which he does impressions of ten other comedians!

When Penny returns from visiting her family in Nebraska, Leonard is happy to see her. Sheldon, however, is much less welcoming when he learns that her family has the flu.

Leonard finally tells Penny how Sheldon saved his life and broke the elevator at the same time.

When Penny dislocates her shoulder, Sheldon brings her home from the hospital and tucks her into bed.

The boys decide to go to Long Beach in order to keep lying to Penny.

Hunger Games star Jennifer Lawrence discusses the end of the franchise, her hilarious relationship with Josh Hutcherson, and much more.

Up-and-coming actress Jennifer Lawrence makes a humorous speech after the Oscars and shows that she is still quite down-to-earth, despite her recent success.

From Monty Python's 1979 film Life of Brian, a religious satire that drew much controversy in its time.