For the second week in a row, Alex & Sierra's 'Scarecrow' claimed the Pop Clash title! After beating out Jacob Latimore last round, can the duo top Nick Jonas' 'Chains'? Who do you think should win this week's Pop Clash?

It's hard to resist the peppiness of Alex & Sierra's 'Scarecrow,' even if the lyrics do suggest something much sadder. 'The X Factor' duo's voices blend flawlessly together and the upbeat melody is stuck in our heads -- in the best way possible! We especially love the combination of the infectious beat and the singers' harmonies.

Nick Jonas' 'Chains' is moody, dark and totally anthemic. It's definitely a departure from what we're used to hearing from the singer, but we love how he still sounds incredible. Like Alex & Sierra, Nick's lyrics convey a complex relationship, but he puts an entirely different spin on it.

Who should win this week's Pop Clash? Vote for Alex & Sierra's 'Scarecrow' or Nick Jonas' 'Chains' once an hour until the polls close on Aug. 11 at 3PM ET.

Watch Alex & Sierra's 'Scarecrow' Video

Watch Nick Jonas' 'Chains' Video