One Direction, often shortened to 1D, were an English–Irish pop boy band formed in London in 2010. The group consisted of Niall Horan, Zayn Malik, Liam Payne, Harry Styles, and Louis Tomlinson. From Wikipedia
In an emotional moment during his Mexico City concert, Malik sang the hit song for the first time in a decade, reflecting on the band's legacy and paying tribute to late bandmate Liam Payne.