Showbiz | Celebrity NewsIt's over! Katy Perry and John Mayer splitThe Roar singer reportedly called off her romance with 36-year-old singer John Mayer 'within the last few days'.BangStaff26 February 2014Katy Perry and John Mayer have split up.The Roar singer - who was seen with a ring on her engagement finger earlier this month, sparking speculation she was set to wed again - reportedly called off her romance with the 36-year-old singer "within the last few days", sources told E! News.It is unclear why the couple have separated, and neither of them have commented on the reports as yet.Katy - who was previously married to Russell Brand - began dating John in summer 2012 and they split briefly last March before reconciling.The Elle Style Awards: in pictures 1/16 The pair recently recorded a duet, 'Who You Love', for John's latest album 'Paradise Valley' and Katy, 29, previously said she was thrilled to work with him because she was a fan of his even before they began dating.Read MoreShe said: "I've been a fan of John's for years before I got to actually kiss him."I've been such a fan, I think he's so incredibly talented and gifted and a genius songwriter. So to be a part of anything he was doing was just natural."