Katy Perry and John Mayer have called it quits.

A source close to the pair exclusively tells E! News that Perry broke up with Mayer within the last few days.

No other details about what prompted the "Dark Horse" singer's decision were forthcoming, but Mayer was noticeably absent from Perry's side on her recent trip to London and Milan. She returned home to Los Angeles on Friday.

Despite some early ups and down, the musical pair fast became one of Hollywood's hottest couples, sweetly gushing about each other in interviews and collaborating on the song "Who You Love," off of Mayer's latest album, Paradise Valley.