If you've ever doubted that the cast of Glee can actually sing, then you need to watch their special live performance on Birtain's The X Factor. And even if you've never had doubts, you should still watch!
During The X Factor results show, Jane Lynch (Sue Sylvester) and Matthew Morrison (Will Schuester) introduced the McKinley High Glee Club for a special performance in front of a screaming audience, PopEater reports.
Simon Cowell looked on as the Glee cast (minus Chris Colfer) performed Journey's "Don't Stop Believin.' "
Watch the performance below!