2 Become 1 third chart-topper and their first Christmas number-one single in the UK. It sold 209,000 copies in the first three days of release and 462,000 in the first week, becoming the tenth best-selling single of the year. "2 Become 1" sold 1.14 million copies in total, giving the Spice Girls their second and final million-selling single in the UK.Despite being released during the final two weeks of 1996, "2 Become 1" was the 5th best seller of the year. In Ireland, "2 Become 1" was the group's second number-one single, and their first to debut at the top of the Irish
British Hit Singles & Albums the 11th edition onwards, the book was compiled by in-house editors at Guinness Publishing and, later, by David Roberts who had already been a chart editor and designer for the original team. From the 12th edition onwards (published in 1999), the book was published every year rather than bi-annually. In 2004, the book merged with "The Guinness Book of British Hit Albums" to form "The Guinness Book of British Hit Singles & Albums". The eighteenth edition of the book (2005) was billed as a "Special Collector's Edition" as it featured detailed information on the 1,000 Number Ones in the UK