Rappers Jay-Z and Sean 'Diddy' Combs have fallen out over Mark Ronson - because they both claim to have discovered the British superproducer.
The 'Big Pimpin' hitmaker is adamant he is the one who turned music producer Ronson into the success he is today, after the two worked together on Jay-Z's 'Fade to Black' soundtrack.
However, Combs refuses to let Jay-Z -.real name Shawn Carter - take the credit for the DJ's high profile.
Jay-Z says: "Me and Diddy have arguments about who discovered him. I'm still saying it was me."