LOS ANGELES, Feb. 26 (UPI) --
U.S. pop stars Katy Perry
and John Mayer
have broken up again, UsMagazine.com said Wednesday.
The website cited unnamed sources as saying Perry's travels to Europe and plans for a lengthy concert tour contributed to the end of their romance.
Perry, 29, and Mayer, 36, first debuted as a couple in 2012. They split up that fall, then again last March and ultimately reunited.
They released the duet "Who You Love" in December.
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