On this day, 14 December 2015, Adele was at No.1 on both the UK and US charts with her third album titled 25. The album was a massive commercial success, debuting at No.1 in more than 25 markets and breaking first-week sales records in many countries, including the UK and US. 25 eventually became the world’s best-selling album of 2015 with 17.4 million copies sold within the year and has sold 20 million copies as of June 2016, making it one of the best-selling albums worldwide.