SEE VIDEO Keisha Buchanan: Mark Ronson's a knob
And Keisha, 23, suggests Mark, 33, is only famous because of his musical collaborations.
'We did like him, we were a fan of his work, but I don’t think he likes us very much,’ she tells the Daily Mirror.
‘It’s fine if you don’t like someone but we’ve heard he’s spoken a lot of shit about us.
'I don’t think he’d be half of what he is if it wasn’t for Amy Winehouse. I think he’s a bit of a knob.’