X Factor fans will be treated to a performance by the cast of Glee during semi-finals weekend.
Lea Michele and Cory Monteith, who star as drama queen Rachel and American football hunk Finn in the award-winning show about a school choir, will show the contestants just how to stand out on stage on Sunday December 5.
They will be joined by co-stars Amber Riley, who plays big-voiced soul sister Mercedes, Chris Colfer who stars as fashionista Kurt, Kevin McHale, who plays wheelchair-bound Artie and Mark Salling who is the show's bad boy Puck.
Glee's sexy, snooty cheerleaders Quinn, Brittany and Santana, played by Dianna Agron, Heather Morris and Naya Rivera will also be appearing, along with Jenna Ushkowitz who plays emo Tina, Harry Shum Jnr, who plays dancer Mike and Chord Overstreet who appears in the second series as new boy Sam Evans.
The performance will be the first time the all-singing, all-dancing Glee cast have appeared live on a TV stage outside of the US.
With Matthew Morrison, who plays choir leader Will Schuester and Jane Lynch, who stars as politically incorrect coach Sue Sylvester, remaining back on the other side of the Atlantic, it will be up to judges Simon Cowell and Cheryl Cole to keep the youngsters in check.
It it yet to be revealed if the remaining X Factor contestants will perform with the Emmy and Golden-Globe winning stars.