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Thousands of concertgoers, of any genre, could attend hundreds of shows in their lifetime and rarely witness on-stage collaborations of their favorite musicians. Even if they did, it might be for a song or two. Certainly not for an entire 90-minute concert of its own.

But that's what happens every year on 70000 Tons of Metal. And this year's cruise laid claim to hosting the best All-Star Jam to date.

Organized and emceed every year by Annihilator guitarist/singer Jeff Waters, who acknowledged the idea was formed over drinks in the karaoke lounge on the inaugural cruise in 2011, the Super Bowl Sunday exhibition in the spacious Alhambra Theater of Royal Caribbean's Independence of the Seas featured a who's-who of metal performing 12 mostly unpredictable classics that made everyone realize they were watching something unique.

With last weekend's seventh annual voyage including a Big 4 band for the first time in Anthrax, and three of those members taking part in the jam, the bar was set high for future treks to top. Members of Testament, Overkill, Death Angel, Annihilator, Scar Symmetry, Therion, Stuck Mojo and others among the 61 bands on board joined forces to play songs ranging from Van Halen's "Romeo Delight" to Iron Maiden's "The Trooper" and Cannibal Corpse's "Hammer-Smashed Face."

See the setlist and song roster breakdown below, including AXS footage of "Grinder" by Judas Priest and "I Wanna Be Somebody" from W.A.S.P. To watch finale "Metal Militia" by Metallica, click the video box at the bottom.

ALL-STAR JAM ROSTER AND SETLIST

1. "Romeo Delight" by Van Halen

  • Vocals: Thomas Vikstrom (Therion)
  • Guitar: Jeff Waters (Annihilator)
  • Bass: Russell Bergquist (Touch The Sun)
  • Drums: Fabio Alessandrini (Annihilator)

2. "War Pigs" by Black Sabbath

  • Vocals: Lisa Cuthbert (Draconian) and Elize Ryd (Amaranthe)
  • Guitar: Alex Skolnick (Testament) and Laura Christine (Zimmers Hole)
  • Bass: Russell Bergquist (Touch The Sun)
  • Drums: Fabio Alessandrini (Annihilator)

3. "Stand Up and Shout" by Dio

  • Vocals: Linnea Vikstrom (Therion)
  • Guitar: Alex Skolnick (Testament)
  • Bass: Steven Wussow (Xandria)
  • Drums: Charlie Benante (Anthrax)

4. "Flying High Again" by Ozzy Osbourne

  • Vocals: Lisa Cuthbert (Draconian) and Elize Ryd (Amaranthe)
  • Guitar: Per Nilsson (Scar Symmetry)
  • Bass: Steve DiGiorgio (Testament)
  • Drums: Charlie Benante (Anthrax)

5. "Riff Raff" by AC/DC

  • Vocals: Mark Osegueda (Death Angel)
  • Guitar: Alex Skolnick (Testament) and Jeff Waters (Annihilator)
  • Bass: Fabio D'Amore (Serenity)
  • Drums: Will Carroll (Death Angel)

6. "The Trooper" by Iron Maiden

  • Vocals: Thomas Vikstrom (Therion)
  • Guitar: Philip Restemeier (Xandria) and Axel Ritt (Grave Digger)
  • Bass: Frank Bello (Anthrax)
  • Drums: Will Carroll (Death Angel)

7. "Wasted" by Def Leppard

  • Vocals: Linnea Vikstrom (Therion)
  • Guitar: Eric Peterson (Testament) and Rich Ward (Stuck Mojo)
  • Bass: Fabio D'Amore (Serenity)
  • Drums: Van Williams (Ghost Ship Octavius)

8. "Grinder" by Judas Priest

  • Vocals: Bobby "Blitz" Ellsworth (Overkill)
  • Guitar: Eric Peterson (Testament) and Axel Ritt (Grave Digger)
  • Bass: Rich Hinks (Annihilator)
  • Drums: Van Williams (Ghost Ship Octavius)

9. "Killed by Death" by Motorhead

  • Vocals: Lisa Cuthbert (Draconian) and Elize Ryd (Amaranthe)
  • Guitar: Esa Holopainen (Amorphis)
  • Bass: Steven Wussow (Xandria)
  • Drums: Janne Kusmin (Kalmah)

10. "I Wanna Be Somebody" by W.A.S.P.

  • Vocals: Georg Neuhauser (Serenity)
  • Guitar: Esa Holopainen (Amorphis) and Rich Ward (Stuck Mojo)
  • Bass: Steve DiGiorgio (Testament)
  • Drums: Gerit Lamm (Xandria)

11. "Hammer-Smashed Face" by Cannibal Corpse

  • Vocals: John Gallagher (Dying Fetus)
  • Guitar: Ben Ash (Carcass) and Terrance Hobbs (Suffocation)
  • Bass: Aaron Homma (Annihilator)
  • Drums: Gene Hoglan (Testament)

12. "Metal Militia" by Metallica

  • Vocals: Mark Osegueda (Death Angel)
  • Guitar: Aaron Homma (Annihilator) and Scott Ian (Anthrax)
  • Bass: D.D. Verni (Overkill)
  • Drums: Gene Hoglan (Testament)