Shinedown and Three Days Grace may be co-headlining their current tour, but the third act on the bill isn't exactly your average opener. Veteran hard rock outfit P.O.D. has been playing alongside the two bands throughout both legs of their touring, making for a solid trifecta of rock acts. P.O.D.'s sets are making it worthwhile to get there early, and the band has enjoyed a set crossover of late with Shinedown's Zach Myers joining their performances to play their cover of U2's 'Bullet the Blue Sky.'

P.O.D.'s U2 cover first appeared on their 1999 breakout record, 'The Fundamental Elements of Southtown,' and turned up in sets over the years. The group has incorporated it into their performances on this run and invited Myers to join in the fun, taking on some of The Edge's wailing guitar parts and rocking out with P.O.D.'s guitarist Marcos Curiel.

Fan-filmed footage of Myers joining P.O.D. from the Baton Rouge stop has surfaced online (and can be seen below). In addition, P.O.D. have been tweeting about some of the recent collaborative performances with Myers, offering photo shots as well.

Watch P.O.D. Perform U2's 'Bullet the Blue Sky' With Shinedown's Zach Myers

For the remaining dates on the Shinedown, Three Days Grace + P.O.D. trek, click here.