PopCrush's 2018 Fan Showdown is a month-long competition to determine the most dedicated fan base. Solo artists, groups, and ex-group members will all face off until a winner is crowned on May 1.

Mirror, mirror, on the wall, who's the fiercest fandom of them all? Is it Adam Lambert's Glamberts? Justin Bieber's Beliebers? Or the fanbase that started it all, Eminem's Stans?We're putting it to the test.

Round 1 of the competition begins today (April 3) and ends on Tuesday, April 10 at noon; Round 2 begins April 11 at noon and ends on April 16 at noon; Round 3 begins April 17 at noon and ends April 22 at noon; the Final Four begins April 23 at noon and ends on April 25 at noon; and the winner of the final showdown will be revealed on May 1.

You can view the full bracket here and vote in the male solo artist quadrant below. The battle begins now!

Bruno Mars' Style Evolution