Megadeth were joined onstage Slash, Black Label Society‘s Zakk Wylde, David Draiman of Device/Disturbed, Jason\Newsted of Newsted and HELLYEAH‘s Vinnie Paul) for a cover of Thin Lizzy‘s “Cold Sweat” during their July 12th show in Dallas, Texas. The majority of the aforementioned artists are currently on tour together as part of this years ‘Gigantour‘.