Selena Gomez is “furious” with her ex-boyfriend Justin Bieber for bringing his rumored love interest Hailey Baldlwin at Sunday’s iHeartRadio Music Awards, Hollywood Life reported Wednesday. Gomez and Bieber were reported to have rekindled romance after the “Hands To Myself” singer was spotted at the Canadian singer’s concert in Los Angeles last month.

“Justin tried to secretly bring Hailey as his date to the iHeartRadio Music Awards,” a source told Hollywood Life. “He’s decided to give things another go with her, and hid her backstage away from prying eyes because he didn’t want Selena to know.”

“However, she went backstage and saw Justin with Hailey and she was furious about the whole thing. That’s why she was so stand-offish with him that night,” the insider told the entertainment website. This explains SO MUCH about Selena’s behavior towards the Biebs during the awards show, where she made it very clear she didn’t want anything to do with him.

Bieber and Gomez were reported to have spent time together at a hotel in Beverly Hills and the 22-year-old “Sorry” singer has been on his “best behavior” to win Gomez back. However, the former couple also reportedly likes to play mind games with each other, because of which they have not got back together. Neither of the stars has reacted to the rumors surrounding them.

The 22-year-old singer reportedly blames his problems with Gomez on Taylor Swift. “Justin knows Taylor doesn’t like him and never will and the feeling is mutual, but he is smart enough to know not to say anything in public or on social media because he knows all the scrutiny he’d endure,” a source told Hollywood Life. “He never expects to be her friend and is not looking to be her friend. He blames Taylor for some of his issues with Selena and that will never go away.”