FULL AUDIO: GLEE Cast Sings 'Beth' from Episode 20 'Theatricality'

A full clip has been released for GLEE's highly anticipated Lady Gaga episode and it features the cast singing the KISS song - BETH!

Television's most award-winning new series, GLEE was recently honored with a Peabody Award; a Golden Globe for Best Television Series, Comedy or Musical; a Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Comedy Series; and a People's Choice Award for Favorite New TV Comedy. The music from GLEE is an international sensation with "Glee: The Music, Volume 1" and "Glee: The Music, Volume 2" topping charts in Australia, the U.K., New Zealand, Ireland and Canada. In the U.S., over 4.5 million songs have been downloaded, and both albums have been certified Gold for sales in excess of 500,000 units.

GLEE follows an optimistic teacher who - against all odds and a malicious cheerleading coach - inspires McKinley High's Glee Club to conquer the world one singing competition at a time. GLEE stars Dianna Agron, Chris Colfer, Jessalyn Gilsig, Jane Lynch, Jayma Mays, Kevin McHale, Lea Michele, Cory Monteith, Matthew Morrison, Amber Riley, Mark Salling and Jenna Ushkowitz.

GLEE is produced by Ryan Murphy Television in association with 20th Century Fox Television. Ryan Murphy, Brad Falchuk and Ian Brennan are co-creators of the series. Murphy, Falchuk and Dante di Loreto serve as executive producers, while Ian Brennan serves as co-executive producer.