2012 net worth: $18.4 billion
2011 net worth: $18.1 billion
Amazon kingpin Jeff Bezos is $300 million richer year on year thanks to a slight uptick in Amazon's stock. Amazon’s music service continues to be a major force in the industry.
(Spencer Platt/Getty Images) More from Forbes
: Top-Earning Dead Musicians Of 2012 Hip-Hop's Cash Kings The Top-Paid DJs The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.