This might be the Pop Clash to end all Pop Clashes. Last week, One Direction's 'Steal My Girl' beat out Maroon 5's 'Maps,' but this week they're up against their pals 5 Seconds of Summer's 'Good Girls.' Which song should win the Pop Clash?

One Direction know when to count their blessings and artfully do so in 'Steal My Girl.' The song, which showcases a new, mature sound for the guys, celebrates appreciating the good things in life. And we have to say, we love that 1D are grateful for all the great things that have come their way. (We're looking at you, Directioners!)

We also love when a band can show off their cheeky side -- just like 5 Seconds of Summer do with 'Good Girls.' The guys assume that good girls have a bad side -- they just haven't been caught yet! Who can resist 5SOS' signature sense of humor paired with a catchy tune? Not us!

Which song should win the Pop Clash? You can vote for One Direction of 5 Seconds of Summer once an hour until the polls close at 3PM ET on Oct. 20.

Listen to One Direction's 'Steal My Girl'

Watch 5 Seconds of Summer's 'Good Girls'

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