by Stephanie SoteriouBuzzFeedBuzzFeed StaffI'm an innately nosey and chronically online celebrity and pop culture journalist, with my specialist areas including deep-diving lyrics and calling out Terrible MenTM. As I'm sure you know, big-name celebrities were among those who attended Justin Bieber's long-awaited headlining set at Coachella on Saturday, with everybody from Paris Hilton to Adele spotted in the crowd.