Selena Gomez and Cara Delevingne are BFFs these days, and they just spent about a week straight partying in Italy for Selena's 22nd birthday.
Cara's been known to cause some trouble, but based on photos we've seen, the whole trip seemed pretty innocent. After all, who could have a problem with a newly single young woman celebrating her birthday with her new bestie?
Justin Bieber, that's who.
Justin and Selena got back together last month and just as everyone suspected, they were broken up again before the tabloids even had time to print the story.
Shortly thereafter, Selena began hanging out with Cara, who is bisexual and recently broke up with Michelle Rodriguez. Well apparently, Justin's imagination has been running wild with thoughts of what Cara and Selena might be up to behind closed doors, and not in a good way:
Sources say Justin has been doing everything in his power to keep tabs on Calena, including drunk-dialing Cara and demanding information.
"Justin has called Cara on more than one occasion wanting to know what's going on," says the insider. "It's been clear that he's had a drink beforehand, too."
Sadly, the source says that Justin's suspicions are unfounded, and there's nothing going on between the newly single gal pals.
"She's just having friend with a new friend," says the insider.
Hot girl-on-girl action that would also piss off Bieber? We should be so lucky.