Aguilera's album sales are estimated at 50 million units worldwide, making her one of the best-selling music artists of all time.
Rolling Stone ranked Aguilera number fifty-eight on their list of the 100 Greatest Singers of All Time, ranking as the youngest and only artist on the list under the age of thirty.
Wow. What other artist has this combination of commercial success and critical acclaim?
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Not many, pretty much the only 1 from our generation.