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Justin Bieber - In 2015, the singer called one of his fans and trolled her, speaking in an English accent. Of course, Ellen DeGeneres was part of all this.

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Channing Tatum - The actor disguised himself as a middle-aged marketing rep during a screening of 'Magic Mike XXL.' He then joined a group of dancers and surprised the audience.

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Adele - Adele attended a BBC audition for a fake show where Adele impersonators  performed. She nailed it with her disguise, we must say.

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Arnold Schwarzenegger - What if the Terminator came back to life and walked down the road or scared fans at a wax museum? That's exactly what Arnold Schwarzenegger did!

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Drake - Drake put on a disguise and took to the streets, asking people what they thought of him.

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Jay Leno - The American TV star went undercover as an UberBlack driver to promote his show, 'Jay Leno's Garage.'

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Katy Perry - According to TMZ, the singer crashed a kid's birthday party and trolled everyone, dressed as a clown.

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Seth Rogen - What if groceries spoke to you? And what if they had Seth Rogen's voice? Well, the actor did have some fun freaking out several customers!

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U2 - The band disguised themselves as buskers and surprised New York subway commuters with an amazing performance.

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LeBron James - What do you do when you go to your local pizza joint and a basketball star is behind the counter? You pretend not to be starstruck!

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Matt Damon - Damon prank-called a number of people to raise money for a charity, 'Jason Bourne' style!

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Usher - The singer disguised himself as a street performer and surprised a fan who thought she was participating in a documentary about him.

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Kardashians - Kendall, Khloé, and Kylie, disguised themselves and went on a Hollywood Tours ride.

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Selena Gomez - Gomez pranked a fan in a fake commercial, as part of Disney's PrankStars.

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One Direction - The boy band pranked their fans by posing as wax figures in a museum.

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Demi Lovato - The singer went undercover as a Lyft driver and it was hilarious. 

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Jon Bon Jovi - Wearing a hat, sunglasses, and a fake beard, the singer surprised fans at a karaoke bar, for charity.

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David Beckham - Would you buy Beckham's fragrance if he tried to sell it to you? The famous soccer star went undercover on 'The Ellen DeGeneres Show' and did exactly that.

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Carrie Underwood - Yet another celeb who pranked people by going undercover and pretending to work at a store.

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Hanson - What, Hanson are releasing an album of Slipknot covers? No, they're not, but the prank video did leave many fans wondering!

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John Mayer - The musician pranked people in a parking lot, all while wearing a bear suit.

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Maisie Williams - Are you a fan of 'Game of Thrones'? What if Williams herself tried to sell you action figures of Arya Stark?

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John Stamos - A video of Stamos freaking out at Netflix's office was just an April Fool's prank. The meltdown scenes are hilarious, though.

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Andy Murray - He might be a great tennis player, but he's pretty bad at serving ice cream. He went undercover and pranked lots of people.

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Jewel - The singer went undercover and surprised fans at a Los Angeles karaoke bar.

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Austin Mahone - It's always funny when a wax figure comes to life. This is what happened with Austin Mahone at Madame Tussauds in Orlando, Florida, US.

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See also - James Corden and other hilarious celebrity pranksters

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