Lady Gaga has landed in hot water after smoking onstage in Canada on Wednesday night (December 9).

Having met Her Majesty in the UK days earlier, Gaga was aptly playing her second sold-out show at the Queen Elizabeth Theatre when she sparked up a fag.

The law in British Columbia bans smoking in all public spaces such as restaurants, pubs and private clubs, offices, malls, conference centres, sports arenas, community halls, government buildings and schools.

Those found guilty of flouting the ban may be liable to a fine.

Gaga was performing at the arena to support the release of her new album 'The Fame Monster'. She plays another show in Vancouver tonight.

(by Scott Colothan)