UPDATE: 5 Seconds of Summer won the Pop Clash. You can vote for them or Austin Mahone in the next round by clicking here.

It's a battle of the boys! After beating out two-time winner Cody Simpson, the Vamps are moving on to face off against 5 Seconds of Summer. The Vamps claimed nearly 80 percent of the votes last week, but is it enough to score them another victory? Who should win this week's Pop Clash?

The Vamps invite fans to seize the day in 'Last Night.' This song is a total pump-up anthem! We love the band's positive attitude and willingness to try anything in the name of living in the moment. It's the perfect track for a party, or even just a pick-me-up.

Speaking of anthems, we are totally digging 5 Seconds of Summers' 'She Looks So Perfect.' The track is super energetic with an amazing rock edge. It completely captures that feeling of falling for someone. Even though the guys are crooning about simmering down, this song totally amps us up!

Who should win this week's Pop Clash: the Vamps or 5 Seconds of Summer? You can vote once an hour until the polls close at 3PM ET on March 24.

Watch the Vamps, 'Last Night'

Watch 5 Seconds of Summer, 'She Looks So Perfect'