Glee’s Cory Monteith, Amber Riley, Lea Michele, Kevin McHale, Jenna Ushkowitz, Naya Rivera, Chord Overstreet, Heather Morris, Mark Salling, Harry Shum, Jr. and Dianna Agron showed up at Britain’s X Factor this week to perform “Don’t Stop Believing,” much to the delight of the crowd. (Chris Colfer was not present, presumably because his character, Kurt, isn’t currently a member of New Directions.)

Their performance was preceded by a funny, taped clip featuring Jane Lynch as Sue Sylvester and Matthew Morrison as club coach Will Schuester.

The number won a rousing standing ovation from the watching judges. Our favorite moment? When Amber Riley stepped down off the stage to belt her line right in Simon Cowell’s face. As any die-hard Gleek will tell you, Riley was rejected during her American Idol audition.

Watch the entire performance in the video above.