http://youtu.be/0l3dsHCScxU

Fans of a cappella group Home Free will be super psyched about their latest cover video: Johnny Cash's 'Ring of Fire'! While the die-hards may recognize the tune as one of the group's signatures from 'The Sing-Off' (which they won last season), this version features special guest Avi Kaplan from Pentatonix.

Calling their cover both a "fan and band favorite," Home Free's Tim Foust opened up about the track.

"Our performance of 'Ring of Fire' on 'The Sing-Off' was such a pivotal moment for us in the competition, and the song has since become a Home Free cornerstone. Fans were (and still are) demanding that we include it in every show," he revealed. "Meanwhile, we had been wanting for some time to collaborate with Avi Kaplan of Pentatonix and vice versa, [and] 'Ring of Fire' provided us the perfect avenue."

Indeed it did, as the guys put their own spin on the classic hit, flawlessly harmonizing as they belt out each distinct note of the song in front of a flickering campfire. Of course, we wouldn't expect anything less from the insanely talented group -- and Avi Kaplan, whose Pentatonix vocal band won Season 3 of 'The Sing-Off'. Check out their cover of Johnny Cash's 'Ring of Fire' in the video above!