UPDATE: Bon Jovi's 'Livin' on a Prayer' won in Round 1! Vote for 'Livin' on a Prayer' in Round 2 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!

It can't be considered true March Music Madness until two of the biggest bands of the '80s duke it out! Your vote will determine which band will continue to vie for Greatest Pop Song of the Modern Era. Both still rocking and rolling today, Bon Jovi and U2 first made it big three decades ago, albeit with a pair of very different hits that have since become their signature songs.

Big theme, big chorus, big guitars, big hair: That's the winning formula behind Bon Jovi's legendary 'Livin' on a Prayer.' The second consecutive No. 1 hit from 1986's 'Slippery When Wet' is so undeniable that a whole new generation of fans propelled it to chart again in 2013. Just listen and try to not sing along. It's tough -- so tough.

Alternatively, U2's 'With or Without You' is a slow boil of a ballad, seductively pulling in listeners with its iconic bassline and almost whispered vocals. The first single off of 1987's 'The Joshua Tree,' it was the Irish rockers' first-ever No. 1 hit in the U.S. The track about conflicted love sparked a beautiful relationship between the band and its fans.

Which tops your charts, PopCrushers? Does Bon Jovi's 'Livin' on a Prayer' have a prayer, or can't you live without U2's 'With or Without You'? Let us know below! You can vote once an hour until the polls close at 12PM ET on March 11. The winning song will move on to the next round and be one step closer to being named the Greatest Pop Song of the Modern Era.