 It received mixed reviews from music critics, who viewed the employment of various musical styles incoherent, but praised Aguilera's vocals.The album peaked at number two on the "Billboard" 200 and has sold over 4.3 million copies in the US as of 2014.In the UK, the album has sold two million copies as of 2017 and was the second highest-selling album by an American female artist during the 2000s decade, behind Norah Jones with "Come Away with Me".