Alright, guys! The penultimate round of March Madness is finally here. This is the one that will determine which fanbases will face off against each other in the final round next week, which means we're only two weeks away from crowning your pick for the best fanbase of all time. This week, we're putting Justin Bieber's Beliebers up against Lady Gaga's Little Monsters. Both fanbases are known for their serious dedication to their faves, so this round will definitely prove to be a tough one. Which fanbase deserves to win?

Justin Bieber's Beliebers use social media to their advantage. They start trending topics on Twitter, defend Justin against other pop stars (most recently involving One Direction's Liam Payne) and constantly support Justin in all his endeavors. Beating out 5 Seconds of Summer's 5SOSFam by 56%, Beliebers are totally willing to do what it takes to make sure Justin wins every award he's ever nominated for -- so long as it's fan-voted.

Lady Gaga's Little Monsters are just as devoted to Gaga as Beliebers are to Justin. It was a super tight race between them and Britney Spears' Britney Army in the last round, but Little Monsters pulled ahead at the very end, earning 50.32% of votes. And while it was a valiant effort on the part of the Britney Army, we can't say we're surprised Little Monsters reigned supreme. They did manage to ensure Gaga's win of seven PopCrush Fan Choice Awards, so this one was a no-brainer.

Which group of devotees deserves to win the Best Fanbase title? You can vote once per hour until the polls close at 3PM ET on March 31, so get to it!

March Madness
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March Madness
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