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Harry Styles

INFphoto.com

Feeling a little tense, Harry Styles?

The One Direction singer was spotted showing off his 19-year-old abs and numerous tattoos while enjoying the sunshine and taking a dip in the pool at the group's hotel in Miami.

So, why was Styles holding onto his shoulder, as if he needed a massage? We have a theory...

Harry Styles, Niall Horan

INFphoto.com

Harry may have been suffering from the strain of carrying bandmate Niall Horan on his shoulders for a friendly game of chicken!

The best mates also enjoyed a round of water aerobics and Horan showed off his ninja skills by doing a karate kick into the water.

The pair were goofing around before their Miami on their Take Me Home Tour, which touches down in Columbus, Ohio, on Tuesday.