A team of special effects artists transforms actor Jace Norman into a completely unrecognisable substitute teacher who is ready to give students at Luther Burbank Middle School an unforgettable surprise.

Multi-talented celebrity Lilly Singh goes undercover as a strange substitute teacher at Woodrow Wilson Middle School in Glendale, California, and pushes the students to their limits with her bizarre behaviour.

Special effects artists transform John Cena so he can go undercover as a substitute teacher to surprise a class of unsuspecting students.

Grammy Award-winning performer Ne-Yo goes undercover and pranks middle school students; he disguises as a master chef with a disastrous recipe, an out-of-control '90s rocker, and a quirky artist.

Using full costumes and prosthetics to hide her identity, WWE superstar Nikki Bella is transformed into three completely unrecognisable characters at Las Palmas Middle School in Covina, California.

Actor Rico Rodriguez goes undercover as a wacky neat freak, an intense karate instructor, and a middle school sub, while his sister Raini Rodriguez pulls the strings behind the scenes.