By Jodi Walker
December 20, 2013 at 05:31 PM EST
Tyler Golden/NBC

It’s been less than two weeks (and over 1,000 crescendos) since The Sing-Off special premiered, but next Monday, it’s already time for the season finale. And, of course, you can’t have a singing competition finale without special guest stars.

EW has learned exclusively that, in addition to season 3 winners and a cappella phenoms Pentatonix, Pat Benatar and Neil Geraldo will also be taking The Sing-Off stage to belt out their 1984 chart-topping hit “We Belong.” Naturally, there will be the usual suspects performing as well: Jewel will duet with Home Free, Shawn Stockman with Ten, and Ben Folds with Vocal Rush. And it just wouldn’t be The Sing-Off without Nick Lachey’s group, 98 Degrees, stopping by to perform “I’ll Be Home for Christmas.”

For a roundup of what’s been happening this season (Puns! Blazers! Ultimate Sing-Offs!), check out our recaps over on PopWatch and watch the exclusive video below to the see the three final groups perform Michael Jackson’s “Man in the Mirror.”

The Sing-Off finale airs Monday at 8 p.m. ET on NBC.