Spice Girls discography sold 23 million copies worldwide and was certified ten times platinum by the British Phonographic Industry (BPI) in the UK. The fourth Spice Girls single, the double A-side "Mama"/"Who Do You Think You Are", also went to number one in the UK. In November 1997 the group released their second album, "Spiceworld", which has been certified five times platinum by the BPI. The album produced three number-one singles in the UK, "Spice Up Your Life", "Too Much" and "Viva Forever", with "Stop" peaking at number two, ending the group's run of consecutive number-one singles in the UK. In May 1998
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