Lady Gaga has left Canadian authorities fuming after she flouted the country's no-smoking rules and lit up a cigarette on stage during a concert.

The Poker Face sensation was playing to a packed crowd in Vancouver as part of The Monster Ball Tour on Friday night.

And the controversial star couldn't help heating things up - shocking fans by lighting a cigarette and puffing deeply on it at the end of her set.

The singer could now face a fine under British Columbia's strict anti-smoking regulations, which bans people from lighting up in indoor public areas.

She isn't the first pop star to come under fire for her habit - in October Lily Allen risked a penalty fee after smoking repeatedly through a concert in Paris, France.

(This news article provided by World Entertainment News Network)