18. Janet Jackson
Stock Watch: Up. Jackson is in the midst of her largest world tour yet in support of her album “Number Ones,” which, as the title suggests, contains a staggering 33 of her chart-topping hits.
Latest Album: 2009’s “Number Ones”
Extracurricular Activities: When not repackaging her music for mass consumption, Jackson has been busy with projects ranging from producing a Barbie doll modeled after herself to writing a new self-help book (which topped the New York Times Best Seller list) to signing a film production contract with Lionsgate. —Jeff Royer
(Photo: Stephen Lovekin, Getty Images)
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