The love triangle rumors between Katy Perry, Robert Pattinson and John Mayer just keep building.

Katy Perry and Robert Pattinson's latest appearance together sparked a big rumor - their alleged engagement.

After the two were seen hanging out together at Bjork's concert at the Hollywood Palladium in Los Angeles on June 8, WeeklyWorldNews.com reported that they are happily engaged. The report noted that the couple celebrated their engagement by going to the concert. They allegedly shared the news with celebrities and fans near them. A "fan who sat near the couple" was quoted in the report saying, "Katy was thrilled.  She couldn't wait to tell the world about the new man in her life."

The website claims to serve "The world's only reliable news," but neither star have confirmed nor denied the engagement claims.

The singer, who was dressed in all black at the concert, didn't mention anything about Pattinson following the event. Instead, she commended Bjork on a job well done.

"Dear Bjork, how do I join your traveling girl cult? #brilliantshow," she wrote on Twitter after the performance. 

While this rumor seems far-fetched, it is probably fueled from the fact that Perry and the British actor have been spotted hanging out several times following his breakup from actress Kristen Stewart in April. Perry and the Twilight star even crashed a stranger's wedding in May, according to People. 

"Katy and Rob were just sitting next to each other watching the wedding rehearsal in the main courtyard area," a rehearsal guest named Stephanie Sands told the magazine. "They were dressed very casually. She was wearing a hoodie and big sunglasses. There was no PDA between them and no body language that showed they were dating. They just sat together and watched." 

The incident came a few days after it was reported that Pattinson left Stewart's Los Angeles home with his personal belongings in May. 

Perry, who also reportedly broke up with singer John Mayer in March, spent Friday night with him, according to Yahoo. The two were seen enjoying a dinner at Chateau Marmont restaurant in West Hollywood with a some of their friends. Still, Perry and Mayer, who has been working on his upcoming record, have been tight-lipped about their relationship. 

Tags: Katy Perry Robert Pattinson