The soundtrack for the upcoming movie 'The Muppets' includes some tried and true Muppet classics like ‘Rainbow Connection’ and ‘Mahna Mahna,’ but also features a few surprises as well. The biggest surprise comes in the form of the Muppets Barbershop Quartet showing off their inner grunge with a performance of the Nirvana classic ‘Smells Like Teen Spirit.’

While the exact context of the song within the movie has not been revealed just yet, it should be noted that former Nirvana drummer and current Foo Fighters frontman Dave Grohl is slated to appear in the film.

'Smells Like Teen Spirit' was the first single off Nirvana’s ‘Nevermind,’ which recently celebrated its 20th anniversary with a new deluxe edition. (Read our review of it here.) The album that has been credited with ushering in a new musical movement that is still being celebrated today by both humans and muppets alike!

‘The Muppets’ soundtrack has four original songs penned by Bret McKenzie of Flight of the Conchords, as well as Kermit, Miss Piggy and company wailing out some of pop and rock's beloved hits throughout the years. Check out the full track listing for ‘The Muppets’ soundtrack below.

‘The Muppets,' starring Jason Segel and Amy Adams, hits theaters on Nov. 23, while the soundtrack arrives in stores on Nov. 21.

‘The Muppets’ Soundtrack Track Listing:

‘The Muppet Show Theme’  - The Muppets
‘Life's a Happy Song’ - Jason Segel, Amy Adams and Walter
‘Pictures in My Head’ - Kermit and The Muppets
‘Me and Julio Down by the Schoolyard’ - Paul Simon
‘Rainbow Connection’ - The Moopets
‘We Built This City’ - Starship
‘Me Party’  - Amy Adams and Miss Piggy
‘Let's Talk About Me’ - Chris Cooper
‘Man or Muppet’ - Jason Segel and Walter
‘Smells Like Teen Spirit’ - The Muppets Barbershop Quartet
‘Forget You’ - Camilla and The Chickens
‘Rainbow Connection’ - The Muppets
‘The Whistling Caruso’ - Andrew Bird
‘Life's a Happy Song’ - Finale Entire Cast
‘Mahna Mahna’ - Mahna Mahna and the Two Snowths