You have other ecosystems looking to be purchased, and while they can appeal to the undecided in the middle, they have a much stronger pull on those who are transitioning from feature phones to smartphones, although family loyalties can influence the first purchased smartphone, the rise of the smartphone means that each week there are far more new customers than there are new voters.

FORBES: Ever Noticed That The Smartphone World Is Just Like A Presidential Debate?

But as well as tackling heated and important issues with his songs, the artist-turned-activist has also been producing and starring in feature films since the early 1990s, using his celebrity to empower and influence others.

CNN: January 9, 2013 -- Updated 1126 GMT (1926 HKT)