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