Which celebrity's smartphone app failed catastrophically in 2016, shutting down after less than one year despite initial popularity, due to content that users found disappointing and not worth the subscription price?

Even with massive star power and millions in marketing, celebrity products can still bomb spectacularly. Behind every successful Fenty Beauty or Beats by Dre lies a graveyard of forgotten celebrity ventures that crashed and burned despite the famous names attached. Test your knowledge of these high-profile product failures that prove even A-list celebrities aren't immune to retail disasters.

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• Katy Perry's 'Katy Perry Pop'
• Kim Kardashian's 'Kimoji'
• Britney Spears' 'Britney Spears: American Dream'
• Blake Lively's 'Preserve'

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