The Grown-Up Guide to Your New Favorite Boy Band, 5 Seconds of Summer

The boys are a perfect mix of adorable, approachable, and a little bit of danger. The band has an extremely active social media presence, following fans, tweeting with them, and sharing plenty of photos on Instagram. They also keep things interesting by tweeting a lot of naked pictures of themselves. (Don't worry, they're more PG-13 rather than X-rated.) Just imagine if members of *NSYNC were sharing photos of their bare bums back in the day!