27. Janet Jackson
In 2011, Jackson embarked on one of her largest world tours yet in support of her album “Number Ones,” which, as the title suggests, contains a staggering 33 of her chart-topping hits. When not repackaging her music for mass consumption, she has been busy with projects ranging from producing a Barbie doll modeled after herself to writing a self-help book (which topped the New York Times Best Seller list) to signing a film production contract with Lionsgate.—Jeff Royer
(Photo: Andreas Rentz, Getty Images)
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