4. Jay Z Acquires Stake in Translation, LLC (2008; Estimated Value: Unknown)
This may be the first time a hip hop artist bought a share of an ad agency, and promptly took it to another level. Jay Z already had a hefty number of appearances in various ads, but to be an owner in an agency means that a product of the culture is ready to control its public image and be able to determine how it is presented to sell these consumer goods.
(Photos from left: Larry Busacca/Getty Images, Kevin Mazur/WireImage)