Which celebrity's smartphone product line failed dramatically in 2013, selling only about 50,000 units despite a massive marketing campaign?

Even the biggest stars can stumble in the business world! This trivia question explores a notable product failure from a celebrity entrepreneur. While many famous people successfully leverage their personal brand into successful product lines, not every venture achieves success. Test your knowledge about a high-profile product launch that didn't live up to expectations despite celebrity backing.

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Alicia Keys' BlackBerry Creative Director line
Will.i.am's Puls smartwatch-phone hybrid
Lady Gaga's Polaroid camera glasses
Robert Downey Jr.'s HTC First 'Facebook phone'