Which album release featured the innovative marketing strategy of releasing a custom smartphone app that allowed fans to unlock content by pointing their phones at physical locations around the world?

Behind every legendary album lies a marketing strategy that helped it reach iconic status. Some artists and labels have completely revolutionized how music products are marketed, creating campaigns that became as memorable as the music itself. This trivia tests your knowledge of groundbreaking marketing strategies that changed the music industry and set new standards for product launches in entertainment.

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Jay-Z's 'Magna Carta Holy Grail' (2013)
Björk's 'Biophilia' (2011)
Radiohead's 'In Rainbows' (2007)
Coldplay's 'Ghost Stories' (2014)