The song list for the landmark 100th episode of Glee has been released, with many new remixes of the show's classic songs.

The 100th episode of Glee, which is appropriately titled 100, features students and teachers alike singing new covers of some of the most significant Glee songs. A song list has been revealed via GleekOutBr, a reliable source for Glee spoilers.

Will Schuester (Matthew Morrison) and April Rhodes (guest star Kristin Chenoweth) will be singing a duet of P!nk's Raise Your Glass, which was originally sung in season 2 by Blaine (Darren Criss) and the Warblers.

Rachel (Lea Michele), Kurt (Chris Colfer) and Mercedes (Amber Riley) will sing Defying Gravity from the Broadway musical Wicked. The song was originally performed by Rachel and Kurt in one of the earliest episodes of season 1.

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Santana (Naya Rivera) will be performing another version of Valerie by The Zutons, as covered by Amy Winehouse and Mark Ronson. This time she will be performing with Brittany (Heather Morris). Santana sang Valerie with the New Directions in a season 2 episode.

Avril Lavigne's Keep Holding On, one of the most significant Glee classics, will be covered by Puck (Mark Salling) in the 100th episode. The song was featured in a season 1 episode focusing on Quinn's (Dianna Agron) pregnancy.

Quinn will be on hand to perform a new version of Toxic by Britney Spears. She will be accompanied by Brittany and Santana for the performance. Will Schuester and the New Directions performed the song in the Britney Spears episode of season 2.

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Finally, there will be one song that has not been featured on Glee to date. Will, April, Blaine, Mercedes and Holly Holliday (guest star Gwyneth Paltrow) will sing Happy by Pharrell Williams.

The 100th episode of Glee airs Tuesday, March 18 at 8 p.m. on Fox.

The series returns for the second half of season 5 on Feb. 25.