It's always great when bands can bring up a guest collaborator from their album during a tour stop and that's exactly what happened when Adrenaline Mob took the stage during a recent show in Nashville. Halestorm frontwoman Lzzy Hale made a surprise appearance, reprising her vocals on 'Come Undone' from the band's debut album 'Omerta' and then sticking around to cover Heart's 'Barracuda.'

The duet between frontman Russell Allen and Hale on Duran Duran's classic 'Come Undone' was one of the highlights of Adrenaline Mob's debut disc and they show equal adeptness at pulling it off live, as the fan-shot video below proves.

As for 'Barracuda,' it's one of the centerpieces of Adrenaline Mob's 'Coverta' covers EP. However, for the performance, frontman Russell Allen tells the crowd he's going to step aside, drink a beer and let the truly powerful Lzzy Hale take on the classic Ann Wilson vocals.

Adrenaline Mob are currently on tour in support of the 'Coverta' covers collection, while Halestorm are gearing up for the 'HardDrive Live' tour.

Watch Lzzy Hale Join Adrenaline Mob for 'Come Undone'

Watch Lzzy Hale Join Adrenaline Mob for 'Barracuda'