Listen: John Mayer and Katy Perry duet 'Who Do You Love' leaks

New track to feature on Mayer's upcoming album

Listen: John Mayer and Frank Ocean reveal new 'Wildfire' duet

New 90 second track premiered online

Frank Ocean confirmed to guest on John Mayer's new album

The singer will appear on track 'Wildfire'

John Mayer tickets for London arena gigs on sale now

Katy Perry's ex to visit UK in October

John Mayer - tickets

John Mayer announces two London arena gigs in October 2013 - tickets

Katy Perry's ex to hit the UK for shows

Gentlemen form an orderly queue: Katy Perry splits from John Mayer

Pair's relationship could finally be over

Frank Ocean performs with John Mayer on Saturday Night Live - watch

Star performs two tracks from Channel Orange

John Mayer banned from singing for six months

We might be saved from a Katy Perry duet after all

Katy Perry splits from rocker John Mayer

Couple split after brief relationship

John Mayer slams 'lousy' Taylor Swift for song lyrics

US star angry at her track 'Dear John' about pair's 2010 break-up

John Mayer Cancels T In The Park Appearance

Due to 'unforeseen circumstances'...