The Grammy winner says new duet gives fans both sides of the relationship. Singers Katy Perry, left, and John Mayer attend the 55th Annual GRAMMY Awards at the STAPLES Center, February 10, 2013 in Los ...
Billboard was on the scene as chart-topping musicians and big-time industry execs celebrated at L.A.'s most exclusive events. By Billboard Staff This story first appeared on billboard.com After the ...
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