1D, an English-Irish pop boy band formed in London in 2010, consists of Niall Horan, Liam Payne, Harry Styles, Louis Tomlinson, and formerly Zayn Malik. After finishing third in the X Factor, they signed with Syco Records. Social media propelled them to global success, with five albums topping charts. Their first no. 1 in the UK, "What Makes You Beautiful", was the highest US debut for a British act since 1998. "Live While We're Young", "Best Song Ever", "Story of My Life" and "Drag Me Down" were also hits. Four made 1D the first band to debut their first four albums at no. 1 on the US Billboard 200. 2013's Midnight Memories was the best-selling album worldwide.
