Two of metal's greatest vocalists go toe-to-toe in the semifinals of our President of Heavy Metal election. The infinitely ordained 'Metal God' in Judas Priest's Rob Halford has been a favorite from the start, having taken Lamb of God's Randy Blythe and Slayer shredder Kerry King out of the running. The 'Screaming For Vengeance' legend is now set to face the 'Bark at the Moon' icon.

Ozzy Osbourne is another one of metal's finest vocalists. Along with Halford, Ozzy would make any Top 10 list of metal's greatest all-time singers. Ozzy defeated disgusting space monster Oderus Urungus in the first round, before eliminating one of rock and metal's most beloved figures, Tool's Maynard James Keenan, in the quarterfinals. We've got an amazing matchup in this semifinals round, and it's all up to you to decide who moves on to the finals.

Rob Halford or Ozzy Osbourne? Cast your vote in the poll below! Voting for this round ends on Friday, Nov. 2 at 10am ET. Fans can vote once per hour, so keep coming back to make sure that your favorite metal musician wins!