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Shania Twain

Thanks to songs like "That Don't Impress Me Much," "The Woman In Me," and "You're Still the One," Shania Twain is one of the top-selling female artist in any genre of all time, and she is the best-selling country artist of all time. Still, she has a rule about staying just country enough. "I would definitely be considered a pop artist," she told CBS News in 2009. "My roots are country, that's for sure ... As long as Dolly Parton always likes my music, then I think I'm safe."

Country Crossover Stars

Some country music stars are so popular that they transcend their genre. Artists such as Taylor Swift, Keith Urban, and Lady Antebellum are a big deal, no matter how far you are from Nashville!