Everyone has specific things they need to achieve the perfect workout. Maybe it’s that the room has to be at a cool temperature or you just can’t complete that last round of sprints on the treadmill. Or you need to wear the swim cap in the same color every time you get into the pool. The blue one just won’t do; it has to be neon green.

Apparently, Taylor Swift recently had a gym thing, too: She needed to be the only one there. Per TMZ, recently, Swift entered Dogpound Gym in West Hollywood with a security team, who insisted that everyone clear the room. But one person of note did not do as he was told. Justin Bieber was reportedly still wrapping up his workout and didn’t budge when asked to do so.

It turns out, TMZ says, that Bieber didn’t know it was Swift who needed the room cleared and after he finished his workout, he was “goofing around and dancing.” He finally left, and everyone else who remained did, too. The Lover singer apparently had an appointment with the trainer, so that’s why she needed the room clear. Her appointment was for a solo training session, which is actually pretty understandable. Bieber was just there working out on his own.