Although she has multiple awards for her music - including an Oscar and a number of Grammys - Adele said singing on the show in front of the panel - Simon Cowell, Rita Ora, Cheryl Fernandez-Versini and Nick Grimshaw - was terrifying, reported Femalefirst.
"I don't think I could go through that again. You're so close, I feel like I'm auditioning. You look so far away on the telly.
