The end of January gets advertisers the world over jittery with the anticipation of America's famous Super Bowl TV adverts. The first major reveal of 2013 goes to German car manufacturer Volkswagen, whose "Get Happy" campaign cost a reported $8m.

Just days after announcing their withdrawal from advertising on Facebook (and putting a rather sour note on the social networking giant's forthcoming IPO) General Motors have shocked the marketing world again by announcing that they will not advertise during the 2013 NFL Super Bowl.