Harry Styles may have a lot of practice being on stage after performing with One Direction for four years, but he suffered from major stage fright! The singer poked fun at his phobia while filming the band's holiday special, joking that he had to leave the stage because he was too scared to continue.

He isn't the only star who has had to cope with serious stage fright, even though he seems like such a cool, collected pro onstage. Click through to see other pop stars you would never believe get scared to perform on stage!