 The album received generally favourable reviews from contemporary music critics, many of whom appreciated the album's combination of melodic song craft and catchy, pop-oriented material that, while slickly produced, avoided the commercial cynicism and adult contemporary posturing of some of their' 80s and '90s forebears. An international success, the album topped the charts in sixteen countries and, by December 2012, has sold over 4.5 million copies worldwide. The album bowed at number two on the UK Albums Chart and ultimately became the UK's fastest-selling debut album of 2011. Up All Night debuted to number one on the United States Billboard 200, selling 176,000 copies in its first week. According to the International Federation of the Phonographic Industry (IFPI), Up All Night was the third global best-selling album of 2012 with sales of 4.5 million copies.
