Credit: Adam Rose/FOX ©2012 Fox Broadcasting Co.

After years of waiting — and yes, we really have been waiting that long — Glee is finally doing a Backstreet Boys number! What’s more, the show is also doing an ‘N Sync song.

It’s a mashup. Finn (Cory Monteith) vs. Will (Matthew Morrison). Backstreet Boys vs. ‘N Sync. Talk about an epic boy band face-off! We’re freaking out about it already.

Season 4, Episode 16: “Feud” is all about the musical showdowns. From Blaine (Darren Criss) vs. Sue (Jane Lynch) doing Mariah Carey and Nicki Minaj to Ryder (Blake Jenner) vs. Unique (Alex Newell) doing Elton John and Madonna, here’s your first look at the full track list from the episode, as well as your first listen to the full audio from each of the songs.

Track List:

- Marina and the Diamonds’ “How to Be a Heartbreaker,” performed by Rachel (Lea Michele) and Brody (Dean Geyer)

- Paula Abdul’s “Cold Hearted,” performed by Santana (Naya Rivera)

- Mashup of Mariah Carey’s “I Still Believe” and Nicki Minaj’s “Super Bass,” performed by Blaine and Sue

- Mashup of ‘N Sync’s “Bye Bye Bye” and Backstreet Boys’ “I Want It That Way,” performed by Finn and Will

- Mashup of Elton John’s “The Bitch Is Back” and Madonna’s “Dress You Up,” performed by Ryder and Unique

-Tegan and Sara’s “Closer,” performed by Ryder and Jake (Jacob Artist)

Source: Amazon

Credit: YouTube Photo: First Listen: Santana's "Cold Hearted" in Season 4, Episode 16: “Feud”
Credit: YouTube Photo: First Listen: "How To Be a Heartbreaker" by Rachel and Brody in Season 4, Episode 16: “Feud”
Credit: YouTube Photo: First Listen: "Bye Bye Bye"/"I Want It That Way" Mashup in Season 4, Episode 16: “Feud”
Credit: YouTube Photo: First Listen: "I Still Believe"/"Super Bass" by Blaine and Sue in Season 4, Episode 16: “Feud”
Credit: YouTube Photo: First Listen: "The Bitch Is Back"/"Dress You Up" by in Season 4, Episode 16: “Feud”
Credit: YouTube Photo: First Listen: "Closer" by Ryder and Jake in Season 4, Episode 16: “Feud”