Lea Michele and the Cast of Glee Wow Simon Cowell on The X-Factor

The cast of Glee paid a visit across the pond to say hello to their international fans and perform on the popular U.K. singing competition series The X-Factor. Lea Michele, Cory Monteith, Mark Salling, Naya Rivera, Amber Riley & Co. broke out McKinley High's Grammy-nominated signature song, Journey's "Don't Stop Believing," as they performed for the TV show's notorious judge, Simon Cowell. The clip even includes footage of Jane Lynch and Matthew Morrison cracking jokes about Cowell before introducing the young stars. Take a look below!