UPDATE: Adele's 'Someone Like You' won in Round 1! Vote for 'Someone Like You' in Round 2 of the competition here.

Welcome to March Music Madness! Here at PopCrush, we've selected 32 of the most iconic pop songs released from the '80s to today (divided into brackets by decade) -- and now it's your job to vote and decide which song will be named the Greatest Pop Song of the Modern Era. May the best song win!

Both Adele and Lorde are one-named pop stars with powerful, alto voices and distinct styles that set them apart from other artists their age. But, of course, each singer has her own unique voice, which Adele belts on 'Someone Like You' and Lorde croons on her smash hit 'Royals.' Which song is more deserving of being called the Greatest Pop Song of the Modern Era?

Adele's deep, piano-based 'Someone Like You' evokes the kind of feelings that have us sobbing into a pint of Ben & Jerry's. Not only is it an achingly heartbreaking tune, but she delivers it with a rich and mature voice that is wise beyond her years. The song may be sad, but it has certainly served Adele well: Upon its release in 2011, it hit the No. 1 spot in the U.S. and the U.K., where it remained for five weeks, and it won a Grammy Award.

Lorde burst onto the scene with 'Royals' in 2013, and we haven't stopped singing it since. Her smoky vocals seamlessly intertwine with the uptempo beat, giving the song an endlessly catchy feel. But it is the relatable lyrics that truly drive home the song -- which spent several weeks at No. 1 and is the recipient of two Grammys -- and separate it from everything else on the radio today.

Which is the greater pop song? Vote for 'Someone Like You' or 'Royals' once every hour until the polls close on March 11 at 12PM ET. The winning song will move on to the next round of our Greatest Pop Song of the Modern Era competition.