X Factor contender Wagner Carrilho has laughed off stories about him smoking cannabis, saying he is "a singer, not a saint".
Pictures showing the Brazilian sharing a rolled-up cigarette with a work colleague were published on Friday.
But the singer, who lives near Dudley in the West Midlands, joked: "Every spliff is a roll-up but not every roll-up is a spliff. Sorry if I'm a singer, not a saint."
Wagner is one of the favourites to be voted off this week when two acts will get the boot - and he won't have done himself any favours with the judges after being taped saying the show "stinks like a set-up".
He was reported in The Sun as telling a friend: "I don't think I will win because they won't let a Brazilian win."
But things are looking up for one of his fellow contenders in the over-28s category, Mary Byrne, after she unveiled a secret weapon in her bid for pop stardom - fruit and veg.
The 50-year supermarket checkout worker from Dublin is crediting her recent strong performances on the ITV1 reality show to her new healthy diet.
A show insider said: "She is eating really healthily and stocking up on fruit and vegetables and it really shows in her appearances in front of the judges."
But a string of confident performances have seen the bookmakers make her fourth favourite to win the show at odds of 17-2.
They have installed boyband One Direction as new favourites ahead of the previously much-fancied Matt Cardle.