Justin Bieber's family is very worried about his new hobby! At the moment, you won't find the pop star knitting, gardening, reading, or doing any other relaxing activity in his spare time. Definitely not obsessing over sourdough like another pop star we could name! No, he took up a more alarming hobby - guns. According to a new report from RadarOnline on Thursday, the pop star is obsessed with firearms right now. If you scroll down on his Instagram, you'll notice Justin posted several pictures of himself firing off rounds with friends over the summer.