Which song will reign supreme as the Song Of Summer 2015? We’re going through some of the top contenders of the year so far. Place your vote for your fave!

You came. You saw. You voted. And now, there are just two finalists left in the battle for the title of PopCrush's Song Of Summer 2015.

Britney Spears and Iggy Azalea reigned supreme in their brackets against Major Lazer and Flo Rida with their infectious space alien lady bop, "Pretty Girls," while Kelly Clarkson has stayed strong against both Tori Kelly and Sia with her own almighty Piece By Piece self-empowerment anthem, "Invincible." But who will survive this final head-to-head round? It's up to you, the fans, to decide.

Have one last listen to both songs in question below, consider carefully, and then place your vote in the final round of our 2015 Song Of Summer poll.

CONTENDER ONE
The song: "Pretty Girls"
The performer(s): Britney Spears & Iggy Azalea
The producer(s): The Invisible Men
The charts: No. 29 on the Billboard Hot 100 (peak position to date)
The video: Earth Girls Are Easy-inspired alien-turned-Valley Girl shenanigans. And totally good acting. Like, total-lay.
The reasoning: Let's just get it out of the way now: Yes, "Pretty Girls" sounds a whole lot like last year's Song Of The Summer, "Fancy." It also happens to feature the same artist who made that song popular (I-G-G-Y), as well as the same production team (The Invisible Men). That being said, the pretty girl empowerment anthem has enough of its own cool and funky charm! The campy cut features The Holy Spearit serving up old school Adlibney (those runs at the end!) and undeniable earworms ("Like bees to the hon-ay!"). The song supplies more than enough sass to provide the soundtrack to countless nights out on the town with all your pretty girls in tow. So pret-tay!

CONTENDER TWO
The song: "Invincible"
The performer: Kelly Clarkson
The producer: Greg Kurstin
The charts: Debuted at No. 50 on Billboard Pop Digital Songs in March, currently uncharted
The video: It’s very much Miss Independent in a nutshell…err, big, glowing box.
The reasoning: The midtempo, orchestral tune is an arguably unorthodox choice for Song of Summer: It's not held captive by a drum machine, it won't pack a dance floor at last call and it doesn't bear a single mention of what's on ice behind the bar. But Clarkson has never been one for gimmicks, and with "Invincible," she's got her fans—who have come to expect substance over style—right where she wants them. The second Piece By Piece single, which was hand-delivered by Sia (whose unmistakable timbre serves as deliciously eerie background), speaks to Clarkson's enduring message: Even if you fall (and Miss Independent has got stumbling down to a science), your knee-scrapes will eventually calcify into a suit of armor. If she was stronger before, she's since become unconquerable.

The time has come to decide: Which of these two songs will ultimately take the crown? Vote now!

Voting ends at 5 PM on June 17. Go, go, go!

Song Of Summer 2015 Finals Britney Kelly
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