Michael Clifford and Calum Hood are super close and of course that's pretty obvious considering they are both members of the same band. But, the 5 Seconds of Summer cuties just showed the world how tight their bond REALLY is.

While the heartthrobs are all on tour right now that doesn't mean there isn't time for some fun! And when it's hot outside, you know what that means. These guys aren't afraid to take it all off – even if it's just for a photo!

Calum posted the shot with the caption, "Skinny dippin at midnight #couplegoals #thinspiration #vegan @michaelclifford."

LOL! These two are seriously crazy but we must admit we do love getting a glimpse at their antics. Fans were also wondering though, we're the guys really naked under the water or were they just trying to stir up trouble on social media?? Your guess is as good as ours!

What do you think of the skinny dipping photo? Let us know in the comments below!

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