Believe it or not, Maynard James Keenan is celebrating his 50th birthday today (April 17)! The frontman of Tool, A Perfect Circle and Puscifer hasn't lost a step since Tool formed in 1990, and he has gone on to prove himself as one of music's most talented and dynamic vocalists.

Keenan can harness beauty in its truest form with tracks such as Puscifer's 'Monsoons,' attack the very core of anger with Tool's 'Pushit' and tell a humanistic story in pieces like A Perfect Circle's 'Judith.' Like we pointed out in a past feature, Keenan's voice can both sing you to sleep and scare you to death.

The voice of Maynard James Keenan is one-of-a-kind, and to celebrate the man's 50th rotation around the Sun, we've gathered Five Amazing Maynard James Keenan Vocal Performances.