Which pop star's heavily-hyped 2014 digital retail venture failed spectacularly, losing $12 million and being discontinued within 14 months despite having over 100 million social media followers?

The world of celebrity-backed product launches is filled with stunning successes and spectacular failures. While some celebrity products like Fenty Beauty and Beats by Dre become billion-dollar empires, others crash and burn despite massive promotional campaigns. This trivia question examines one of the most notorious pop culture retail failures of the past decade, where celebrity influence couldn't save a doomed digital product.

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Britney Spears' 'Beautygram' subscription box service
Rihanna's 'Styled By' fashion recommendation app
Lady Gaga's 'Backplane'-powered social network 'LittleMonsters.com'
Justin Timberlake's 'StyleShare' virtual wardrobe platform