Katy Perry and John Mayer break up!

According to an exclusive report by E!, Katy Perry and John Mayer have split after dating on and off for almost two years. A source close to the couple told E! that Perry broke up with Mayer within the last few days.

No other details about what prompted the 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." E! reports