On April Fools' Day, it only feels right to look back on some of our favorite pranks carried out by teen celebs that put a smile on our face.
While Justin Bieber has a reputation for his sense of humor and his ability to constantly pull off funny shenanigans, Biebs is not the only young celebrity who knows how to crack a joke. Last July, members of One Direction pranked each other in an interview with Nickelodeon, and we've also seen Zac Efron and Taylor Swift join in on the fun.
Click through the slideshow below to see our complete list of eight hilarious pranks from teen celebs and watch the videos documenting their crazy antics.
Who do you think is the funniest? Have you ever filmed a prank? Tell us in the comments or tweet at @HuffPostTeen.
Willow Smith Talks About Pranking Justin Bieber
On Radio Disney last year, Willow Smith talked about how she pranked Justin Bieber when she was on tour with him before he <a href="http://www.huffingtonpost.com/2011/03/23/justin-bieber-pranks-will_n_839855.html" target="_blank">pranked her</a>. Without him knowing beforehand, she went up on stage with her camera when Biebs started singing "One Less Lonely Girl" and started snapping pictures like paparazzi. When Bieber noticed Willow taking the pictures, he gave her a wide-eyed smile and told her "she's crazy." Her response to Justin: "Don't mess with me."
One Direction Pranks Each Other
Bandmates are usually supposed to stick together, but Zayn and Louis decided to <a href="http://www.huffingtonpost.com/2012/07/23/one-direction-nickelodeon_n_1694754.html" target="_blank">prank</a> the rest of One Direction in an interview with Nickelodeon. The producer pretended to go into labor in the middle of their interview and threw everyone else for a loop. Not only were the boys too frazzled to be much help, but the look on Harry Styles' face when the producer made them think she was about to give birth was absolutely... priceless.
The Jonas Brothers Prank Call A Fan
While they were filming a live UStream <a href="http://www.youtube.com/watch?v=5dx15QFZb5U" target="_blank">video</a>, the Jonas Brothers took it upon themselves to prank phone call a fan named Molly and pretended to be her principal. In a crazy voice, they left her a message saying she left her bicycle at school and asking her to come get it, signing off saying, "Bye, Molls." We're guessing the JoBros may have gotten more laughs out of it than Molly.
Taylor Swift And Zac Efron Prank Selena Gomez And Justin Bieber
Taylor Swift and Zac Efron teamed up to make some of their friends look awkward by sneakily <a href="http://www.ellentv.com/2012/02/22/taylor-swift-and-zac-efrons-dance-dare/" target="_blank">dancing</a> behind them. Betty White, Justin Bieber, Selena Gomez, and Akon had no idea that these two were making funny dance moves behind their backs... until they talked about it on "The Ellen DeGeneres Show."
Justin Bieber Drive-Through Prank
From prank <a href="http://www.youtube.com/watch?v=7hUsyTCaMBM" target="_blank">calling </a>Miley Cyrus to tricking Taylor Swift on "<a href="http://vimeo.com/41127465" target="_blank">Punk'd</a>," Justin Bieber is known for his sense of humor and ultimate pranks. The teen pop star has made it clear that he likes to have fun messing with other people, which is exactly what he did when he tried to return a Wendy's milkshake to a Burger King drive-through, claiming "it wasn't good" and he wants his money back. The person who worked at Burger King didn't laugh too hard, but Biebs' car full of people got a good chuckle out of it.
Selena Gomez Pranks A Fan On 'Prank Stars'
On an episode of Disney's "<a href="http://www.youtube.com/watch?v=f6hKhc-dDrE" target="_blank">Prank Stars</a>," Selena Gomez pranks one of her biggest fans, Mary. Selena pretends not to be herself and is just a regular teen trying out for a bubblegum commercial alongside Mary. After Selena acts like a shy and awkward teen and causes the director to constantly criticize her on set, she eventually reveals who she really is... to Mary's surprise!
Debby Ryan Pranks A Fan On 'Prank Stars'
Debby Ryan also appeared on an <a href="http://www.youtube.com/watch?v=dPiGK_Yj9wE" target="_blank">episode </a>of Disney's "Prank Stars." This time, her fan -- Albany -- is well aware of who she is, but Debby is tricking Albany into thinking she's extremely sick in the dressing room of a clothing store. Albany ends up replacing her in a pretend fashion show she's supposed to walk in. After taking this prank pretty far... Debby finally reveals that the whole thing is a joke, especially so Albany doesn't have to feel bad about firing her from her own clothing line.
Demi Lovato Pranks Travis Clark On Tour
Back in 2011, Demi Lovato <a href="http://www.disneydreaming.com/2011/12/06/demi-lovato-pranks-we-the-kings-on-stage-at-their-concert/" target="_blank">toured</a> with We The Kings and spent her down time planning different <a href="http://www.thehothits.com/news/27634/demi-lovato-and-travis-clark-prank-each-other-on-stage" target="_blank">pranks</a> on singer Travis Clark and the rest of the band... and we're not just talking minor mishaps. Once, Demi ran on stage right in the middle of a concert, along with her backup dancers, and threw pie in the band members' faces. We The Kings didn't take that sitting down, however, and continued to retaliate against Demi for the rest of the tour. Sounds like a fun way to spend time getting to know who you're working with!