VIDEO: Ariana Grande Plays Halloween Trick on Fans on JIMMY KIMMEL

Ariana Grande performed a special concert on last night's Jimmy Kimmel LIVE on ABC. Prior to her appearance she tweeted out to her fans who planned to be in attendance to show up in Halloween costumes for a special contest.

At the concert, two costumed audience members were selected as finalists along with a third dressed in a chicken costume who was actually Grande herself! Below, check out what happens when all three contestants are asked to sing a Grande tune!

Jimmy Kimmel serves as host and executive producer of Jimmy Kimmel Live, ABC Television Network's late-night talk show. Now in its tenth season, JKL is packed with hilarious comedy bits and features a diverse lineup of guests including celebrities, athletes, musicians, comedians and humorous human interest subjects. Every night, Kimmel delivers his up-to-the minute take on the latest news and pop culture topics from the day's events in his monologue. Kimmel has welcomed such notables as Martin Scorsese, Meryl Streep, Eddie Murphy, Tom Cruise, Woody Harrelson, Jamie Foxx, Robert Downey Jr., Mark Wahlberg, Zach Galifianakis, Charlize Theron, Tim Allen, Simon Cowell, Adam Sandler, Ellen Degeneres, Mickey Rourke, Taylor Lautner, Robert Pattinson, Channing Tatum, John Krasinski, David Beckham, Shaquille O'Neal and many more, including Matt Damon... well, almost Matt Damon.

Kimmel's bandleader is his childhood best friend, Cleto Escobedo, and recurring comedy segments include JKL security guard Guillermo Rodriguez, Jimmy's Cousin Sal's hidden camera pranks, No. 1 Celebrity Superfan Jake Byrd and Jimmy's feisty Aunt Chippy. "Jimmy Kimmel Live" features a weekly signature comedy segment entitled "Unnecessary Censorship" which pokes fun at the FCC's crackdown on the media by unnecessarily censoring clips from TV news, political speeches, reality TV and nature shows. The show has also welcomed numerous esteemed guest directors to oversee individual episodes of the program including J.J. Abrams, Quentin Tarantino, Michel Gondry and Jon Favreau.