AUDIO: 'I Feel Pretty/ Unpretty' Mash-Up From Next Week's GLEE!

On next week's highly anticipated 90-minute GLEE episode, Kurt returns to McKinley High and the New Directions address self-acceptance. Click below to listen to a mash-up of TLC's "Unpretty" and "I Feel Pretty" from West Side Story from the upcoming episode!

In the short amount of time since GLEE hit the airwaves, the series has racked up two Platinum and two Gold albums, two Grammy Award nominations, more than 22 million song downloads, the No. 1 soundtrack of 2010 ("The Christmas Album") and an incredible 19 Emmy and 11 Golden Globe nominations, as well as four Emmy Awards and three Golden Globes, including the award for Best Television Series Comedy or Musical. The critically acclaimed "Glee Live! In Concert!," starring 14 members of the television show's cast, will return to North American concert stages this spring.

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.