Smoothie crooner Michael Buble has been exposed as an arrogant, foul-mouthed pothead who boasts about his manhood.
Ex-model Tiffany Bromley - who is now a wigmaker but secretly dated Buble on and off for a decade from 1997 - said fame changed the Canadian star.
'When I first met Michael he was warm, kind and genuinely sincere,' she told the News of the World.
'But success turned him into a self-obsessed jerk.
'Michael saw himself as a real ladies' man who could schmooze any women into bed, and had done on tours.'
Bromley also revealed 34-year-old Buble, who has just got engaged to Argentine soap star Luisana Loreley Lopilato de la Torre, swore like a trooper and smoked up to three joints a day.
'He always had a couple (of joints) in his wash bag ready to go. He insisted it was his way of winding down at the end of a day. But sometimes he started the day with one.
'He said he needed pot as a key part of his creativity. He said he could write his best songs with it.'


