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

▲The singer went undercover as a Lyft driver and it was hilarious.

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

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

▲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!

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

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

▲Wearing a hat, sunglasses, and a fake beard, the singer surprised fans at a karaoke bar, for charity.

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

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

▲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.

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

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

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

▲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!

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

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

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

▲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.

▲The musician pranked people in a parking lot, all while wearing a bear suit.

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

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

▲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!

▲The boy band pranked their fans by posing as wax figures in a museum.

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

▲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.

▲Hilarious celebrity pranksters

▲

We love it when famous stars have a sense of humor. Even more so when they actually use it to prank their own fans!

What would you do if you encountered your favorite star behind the counter of a store? And what if a famous face showed up as your driver? It's hard to imagine, but many celebs have pulled these and other pranks on their fans.

Click through the gallery and check out the hilarious ways these stars trolled their fans.