Selena Gomez and Justin Bieber have made headlines for their on-off relationship, but Taylor Swift revealed in a recent interview that the "Heartbreaker" singer might have cheated on her while they were dating.

"I've seen my friends take someone back after they've cheated because they fit perfectly," Swift told Glamour UK, subtly mentioning Justin Bieber.

"You do not want to open that can of worms," Taylor reportedly said when asked about Justin Bieber getting booed  when accepting the Milestone Award, an incident that took place with Selena and Taylor sitting in the front row, TheHollywoodGossip.com reports.

Selena Gomez has a new reason to be pissed at Justin Bieber - it appears that the "Come & Get It" singer is trying to move on, but the rep of her ex is getting in the way, TheStir.com reports.

Nathan Sykes, a member of The Wanted, said he would have pursued a relationship with Selena Gomez if it weren't for Justin Bieber.

"[Max George] follows someone on Twitter, then he is in the tabloids saying he is in a relationship. I started following the Selena Gomez and nothing," Sykes revealed in an interview, according to TheStir.com

"Where is my relationship?! To be honest, I always liked Selena, but I really did not want to go that side because Justin would kill me! I would probably receive a call from [mutual manager Scooter Braun] telling me to stay away!"

Taylor Swift revealed during an interview with Glamour UK that she and Selena Gomez laughed hysterically at Justin Bieber, leaving many wondering if the former besties bullied him.

They laughed hysterically over rumors that Taylor "hates" Justin and doesn't want him with Selena, Cambio.com reports.

Taylor caused quite a stir when she was seen sticking her tongue out in disgust over a Bieber and Selena backstage kiss at the Billboard Music Awards and even refused to answer questions about him winning a milestone award that night, Cambio.com also reports.

Selena Gomez and Justin Bieber have been broken up for several months, but recently released information reveals the "Heartbreaker" star may have cheated on her with Ariana Grande while they were dating.

"Justin's the most famous contact I have in my phone," Ariana Grande told M magazine, according to the Hollywood Gossip. "I felt so cool when he started texting me... I didn't believe it was him at first. He wrote, 'What's up cutie?'"

"I dropped my phone and though, 'That did not just happen.'"