This week's Pop Clash pairing promises a very close competition! Katy Perry's saucy 'This Is How We Do' faces off against Ed Sheeran's tell-off 'Don't.' Who should win the Pop Clash?

Katy's 'This Is How We Do' is the perfect summer jam. From its peppy verses to the ultra-catchy chorus (and have you seen that colorful music video?), this song is perfect for the warm weather! Like all of the singles from 'Prism,' 'This Is How We Do' has a unique sound that makes it stand out, while retaining that confidence that is undeniably Katy.

Ed's 'Don't,' on the other hand, is a bitter reminder of what happens when you stray in a relationship. While the singer could have taken the tell-all route, he doesn't identify the lady who wronged him -- but he still gets the point across! Hearing Ed scoff "don't" makes us wonder how anyone could break his heart.

Who should win this week's Pop Clash? You can vote for Katy Perry's 'This Is How We Do' or Ed Sheeran's 'Don't' once an hour until the polls close at 3PM ET on Aug. 25.

Watch Katy Perry's 'This Is How We Do' Video

Watch Ed Sheeran's 'Don't'