The entertainment exec also talks Justin Bieber, Kanye West and more.
Photos from the app's S&M-tinged pajama party at the Standard Hotel.
"If there's eight reasons not to do something and two reasons to do it, you have to have the belief to do it."
Also featuring spots from Lil B, Malik Yusef, Halsey and Le1f.
The legendary music executive also talks success, setbacks and how he "invented December."
After leaving the band that made him famous, ZAYN's solo career is on fire. He talks going it alone, his relationship with Gigi Hadid and why he enjoys singing about sex.