6. Carrie Underwood
Then: Underwood has become the most successful Idol winner, selling over 12 million albums and 18 million digital tracks to date. Since winning the singing competition, she has released three No. 1 albums, won 11 Country Music awards and 5 Grammys. In 2010, Underwood married ice hockey player Mike Fisher.
Now: In 2012, Carrie released her fourth studio album Blown Away which debuted at No.1 on Billboard and is also up for an award at the 2013 Grammys.
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