BARBARA: Katy Perry and John Mayer have split up. The ‘Roar’ hitmaker- 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.–EXPO