After departing the boy band One Direction, who debuted a studio album with its lead single "Pillowtalk"?
Made in the A.M.:  The album is the group's first album following the departure of Zayn Malik, who left the group in March 2015. Zayn Malik:  Adopting a more R&B music style with his debut studio album "Mind of Mine" (2016) and its lead single, "Pillowtalk", Malik became the first British male artist to debut at number one in both the UK and US with a debut single and debut album.
Zayn Malik