Welcome to the first-ever Pop Clash, PopCrush's brand-new weekly song battle! Every week, our staff will choose two singles, and it's your job to vote your favorite into the winner's circle.

For this inaugural song stand-off, fans can vote for either Rihanna's 'Stay,' featuring newcomer Mikky Ekko, or Pink's 'Just Give Me a Reason,' featuring Nate Ruess of fun. Although Rihanna's is a bit slower, both of these heartfelt ballads speak to passionate lovers as they try to stand strong and put the pieces of their relationships back together.

On 'Stay,' the second single off of her seventh studio album 'Unapologetic,' Rihanna gets deeply personal as she sings, "Oh the reason I hold on / Oh cause I need this hole gone / Funny you're the broken one, but I'm the only one who needed saving / Cause when you never see the light, it's hard to know which one of us is caving." From the lyrics alone, you can tell she's singing this one about Chris Brown, and the minimal, forlorn piano and emotive vocal delivery just add extra weight to the already powerful lyrics.

For 'Just Give Me a Reason,' Pink has a similar lyrical approach as her Pop Clash nemesis, singing about a romance gone awry over melancholy piano. Like Rihanna, she and duet partner Nate Ruess refuse to give up on love, except they take a more power-pop, midtempo approach with the swelling beat. With some assistance from Ruess, whose voice matches beautifully with Pink's soaring vocals, she sings: "Just give me a reason / Just a little bit's enough / Just a second we're not broken just bent / And we can learn to love again."

Watch the official videos below to check out both songs in full. Then, be sure to vote for either Rihanna's 'Stay' or Pink's 'Just Give Me a Reason' as your favorite song below!

Watch the Rihanna 'Stay' Video Feat. Mikky Ekko

Watch the Pink 'Just Give Me a Reason' Video Feat. Nate Ruess

Rules of Pop Clash: The artist and song with the most votes wins, and the winner goes on to face a different challenger the following week. If an artist wins four weeks in a row, they will be retired into the Pop Clash Hall of Fame in order to give others a chance to compete.

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