A source in the know spilled:
Kevi and Selena are friends. There was a party that night with 15 or 20 people – just a little kick back – and they were hanging out smoking hookah with some buddies… Justin was pissed. He said, ‘Yo, why were you kicking it with her? I thought you and I were homies.’ He doesn’t think they’re hooking up but doesn’t want his closest friends partying with her.