Amy Poehler, Billy Eichner

This week, Amy Poehler returned to Billy on the Street, and tried to fool New York City pedestrians into thinking she was PitbullBrian Williams returned to The Tonight Show and "rapped" "Gin and Juice," and Barack Obama and Hillary Clinton "sang" "Timber." Also, we got a first look at the first scene of Orange Is the New Black's upcoming second season, and someone counted all the F-words in The Wolf of Wall Street (but it's not what you think). Check out those clips and more in our weekly roundup of the best online videos:

Get the scoop on 39 must-watch season finales

Amy Poehler on Billy on the StreetLove him or hate him, Billy Eichner has no shortage of ideas with which to harass people on the streets of New York City. In this episode of Billy on the Street, he's joined by Amy Poehler, who's "disguised" as Pitbull. Check out their game of "It's Not Pitbull, It's Amy Poehler":

Wolf of Wall Street F-Words: From Screen Junkies, here's a supercut of all the F-words inThe Wolf of Wall Street. But, surprise! It's actually safe for work—we promise.

Orange Is the New BlackWe could hardly click "Play" fast enough when Netflix released the first scene of Orange Is the New Black's second season this week. Is it June 6 yet?

Brian Williams raps: Brian Williams returned to The Tonight Show this week, and in honor of his visit, Jimmy Fallon premiered a new "Brian Williams Raps" video. This time, the NBC News anchor tackles Snoop Dogg's "Gin and Juice."

"Happy" without music: Pharrell's ubiquitous "Happy" is the feel-good song of the year, but if you remove the music from the music video, it's actually kind of sad.

Barack Obama and Hillary Clinton sing "Timber": Will the BaracksDubs YouTube channel ever get old? (Answer: No.) And in the latest video, he gets a little help from Hillary Clinton on a new version of the Pitbull/Kesha collaboration "Timber."

Time-Lapse London: During his Easter break, Lewis Symonds, a 16-year-old student from Great Britain, stitched together this gorgeous time-lapse video featuring 7,500 images of London. The photos were shot over a period of five days, and Symonds says the editing process took him about 24 hours.