It's the Semifinals in our March Metal Madness tournament to determine the Best Metal Song of the 21st Century. Coming from the Devil Horn Region is Avenged Sevenfold's "Nightmare" which will face off against Mosh Pit Region victor, Judas Priest's "Halls of Valhalla."

Avenged Sevenfold's "Nightmare " has been just that... a nightmare on its opponents. The song took out Children of Bodom's "Everytime I Die" in the first round followed by Lamb of God's "Laid to Rest." In the Quarterfinals, the track amassed over 52 percent of the votes over System of a Down's "Chop Suey!"

Judas Priest's "Halls of Valhalla" continues to steamroll some of the biggest names in the tournament, beating out Megadeth's "Kick the Chair," Metallica's "My Apocalypse" and capturing almost 59 percent of the votes against Pantera's "Revolution Is My Name."

So which song will move on to the Final Round of March Metal Madness 2016? Listen to both tracks and vote for either Avenged Sevenfold's "Nightmare" or Judas Priest's "Halls of Valhalla" as the Best Metal Song of the 21st Century in the poll below!

(This poll will end on Tuesday, March 29, at 9AM ET. Fans are able to vote once per hour, so keep coming back to make sure your favorite song wins!)

Avenged Sevenfold, "Nightmare"

Judas Priest, "Halls of Valhalla"

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