Happy B'Day[4] BACK TO BASICS!

Back to Basics reached number one in over fourteen countries, including the United States, United Kingdom, Australia, Germany, Canada, and Switzerland.[58] Debuting at number-one on the U.S. Billboard 200 album chart, Back to Basics became Christina's second number one album of her career. The album also debuted at num ...ber two on the Billboard R&B/Hip-Hop Album chart. She received her best sales week of her career with over 346,000 copies sold in the U.S. alone,[59] as well as the 1st biggest first week sales by a female artist in 2006 at the time of its release before being beaten by Beyoncé's B'Day which sold 541,000 copies in its first week of release.[59] To date, the album has sold over 1.7 million copies in the U.S.[60]Back to Basics is also Aguilera's first album to debut at the top spot in the United Kingdom and it remained 33 weeks in the Top 75.[61] The album was certified on 15 November 2006 for selling over 300,000 copies.[58][62][63] The album has been certified Gold in Japan, Hong Kong,[64] Korea,[64] Austria, Poland,[65] France, Netherlands, Italy and the Czech Republic.[64] It has moreover conquered the worldwide market, catching up and exceeding the threshold of Platinum in the following nations: the UK, Germany, Switzerland, United States, Singapore,[64] New Zealand, Belgium, Hungary and has been certified Triple Platinum in Canada, Ireland and Russia.