'' Back to Basics '' received favorable reviews from music critics , who complimented its musical diversity from Aguilera 's previous albums while there were others who criticized its length . The album received a Grammy Award nomination for Best Pop Vocal Album , and its lead single " Ai n't No Other Man " won Best Female Pop Vocal Performance at the 49th Annual Grammy Awards ( 2007 ) . It debuted at number one on the US '' Billboard '' 200 with first-week sales of 346,000 copies . '' Back to Basics '' achieved similar success internationally , reaching the top of the charts in over fifteen countries including Australia , Canada , Germany , Ireland , Switzerland and United Kingdom . The album has sold 1.7 million copies in the United States , and over five million worldwide , as of November 2013
49th Annual Grammy Awards
49th Annual Grammy Awards
Back to Basics (Christina Aguilera album)