Christina had both the single front, and album strength down unlike Brit, and she had acclaim unlike her. There's a reason why all of Aguilera's singles from that album still get played unlike Brit's.
Britney almost doubled Christina's worldwide sales ('...Baby One More Time' almost sold in the US what 'Christina Aguilera' sold worldwide) and '...Baby One More Time' is the bestselling debut album of all-time as well as the bestselling album by a teenager.
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