Jason Merritt/Getty Images
Tim Stack
March 17, 2014 AT 02:00 PM EDT

Glee reaches the 100 episode milestone with Tuesday’s hour, fittingly titled “100.” To celebrate the occasion, guest-star Gwyneth Paltrow reprises her Emmy-winning role of substitute teacher Holly Holliday (Kristin Chenoweth and Chace Crawford also make appearances) and even gets to croon a cover of Pharrell’s Oscar-nominated hit “Happy.” EW has the exclusive first listen of her version below.

For more tunes, head to Gleethemusic.com. “Happy” will also be featured on the new album Glee: The Music Celebrating 100 Episodes.

Glee airs at 8pm on Fox.

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