This past Monday during a Canadian date of Megadeth's current tour with Black Label Society, the audience was treated to a duet featuring front man Dave Mustaine and Disturbed/Device vocalist David Draiman, as they came together for a performance of 'Dance In The Rain.' Watch it below. 

The track comes off Megadeth's 14th studio album Super Collider, which released June 4. It was originally recorded with Draiman but I'm sure no one expected him to show up for the live performance. Mustaine definitely made his album come to life by adding this "wow factor."