Adele and Graham Norton of the BBC have some fun with Adele impersonators. Adele arrives at the Adele contest disguised as Jenny, a dowdy nanny, with her face rearranged by a skillful makeup artist and with a funny walk. She's just one of many impersonators until she takes the stage and begins singing in her inimitable voice.

ALF has wandered into the home of Elvis Presley! At least that’s what he thinks based on the memorabilia that’s all around. And it doesn’t take long for “Elvis” himself to get home...

“Elvis” opens the door to a nosy neighbor, and then has the difficult task of dissuading Alf, who still believes he’s in the presence of “The King.”

ALF stands for Alien Life Form, and was the name of this nineteen eighties American sitcom and its main character. In this episode, ALF has promised to behave well for a week, taking to extremes a new role as a posh servant and chef. Now his host family is wishing for a return to normality.

ALF adopts the role of family psychologist, but however well-meaning his efforts, only succeeds in getting on everyone’s nerves!

Willie is sure he didn’t invite his boss to the party, and why are all his guests arriving in costume? Just as he guesses who might be responsible, ALF makes his entrance, masquerading as an old family friend.

Mike Myers, dressed in a proper kilt, introduces Sean Connery at the American Film Institute's 34th Life Achievement Award: A Salute to Sean Connery.

Mike Myers concludes his comedic yet personal and moving tribute to actor Sean Connery on the night he receives a lifetime achievement award from the American Film Institute.

Jimmy Carter about Adam Sandler: “He doesn’t do a lot of interviews anymore, but he used to be a nice guy, like a lot of funny folks, sort of shy, and listen to him talk about his childhood.”

Comedian Trevor Noah, who now hosts the Daily Show, compares the differences between England and Africa when it comes to obeying traffic lights. In particular, he doesn't understand why people in England are so obsessed with pressing the button in order to get the "walk" signal.

English comedian Michael MacIntyre discusses the ironies of new technology. First, he talks about Google Earth and the address most people first type in when they try it out. Then he takes on motion sensors in public restrooms.

Grimmy rigged up Harry Styles to a heart monitor to see what images would cause an increased heart rate. Will it be Ryan Gosling, a briefcase full of money, Zayn Malik, or purple shoes?

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!

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.