The brief history of social media is already littered with companies generating publicity for all the wrong reasons.

General Motors has been forced to pull its latest TV commercial for a Chevrolet 4WD in Canada and Europe, amid claims it is racist.
The ad, which features swing dancing and singing, has the line: 'In the land of Fu Manchu, the girls all now do the Suzy Q, clap their hands in the centre of the floor saying 'ching-ching, chop suey, swing some more'.

GM has apologised for the offensive ad - which was slammed on social media - and it has been withdrawn globally. But GM is not alone.

Here's some other noteworthy social media flops and fiascos frmo the past few years.