The reason behind the breakup of “Twilight” on- and off-screen lovers Robert Pattinson and Kristen Stewart was originally cited as issues with “priorities,” but another celebrity may have been the cause of the end of the highly publicized romance. A source close to the famous duo is now claiming that pop singer Katy Perry created a wedge between the former flames.

After the news that Pattinson and Stewart had ended their three-year romance Saturday, a source told E! News Monday that “I Kissed a Girl” singer Katy Perry, 28, is reportedly interested in Pattinson. And a source says Perry “played a role as one of many reasons.”

Rumors that Perry and Pattinson were more than just friends began circulating after Chelsea Handler reported on “Chelsea Lately” that the two were spotted leaving the Met Gala in New York City together on May 6. Handler said the pair was seen “having dinner, hanging out and laughing” while Kristen Stewart attended the coveted fashion event without a date, walking the red carpet alone. E! News reported last week that Perry was also on the guest list for Pattinson’s 27th birthday extravaganza at his and Stewart’s Los Feliz., Calif., home.

This isn’t the first time Perry and Pattinson rumors have surfaced, with the actor reportedly comforting the singer after the end of her marriage to comedian Russell Brand in 2012. The Daily Star reported that Perry repaid the favor, consoling the actor following reports that Stewart, 23, had an affair with her 42-year-old married “Snow White and the Huntsman” director, Rupert Sanders.

“She has reassured him she is very much there for him just as he was for her when she split from Russell. She urged him to break up with her,” the source said.

Despite reports that the Perry may be soon getting hot and heavy with the UK native, a source told E! News Sunday that the “Twilight” star's split is only temporary, claiming the couple was still shacking up together for the sake of their animals.