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48. Shari Ballard
President, Americas
Best Buy (BBY)
Previous rank: New
Age: 44

She's come a long way since starting her career at Best Buy as an assistant store manager in Flint, Mich. This year Ballard took over joint responsibility of the Americas, including call centers and BestBuy.com.

NEXT: Phebe Novakovic
Last updated September 30 2010: 2:47 PM ET
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