Niall Horan told ET, "There's a few different sounds on the album, not all the songs sound the same...It's a lot different than what we did before." Liam Payne added that there is "a lot of old school vibes as well," calling the new songs "very diverse."
Album info aside, the guys also revealed some deep, dark secrets – namely, which of them gets most homesick while touring, who sleeps in the most, who text messages the most, and who is most likely to take selfies from their bunk:
Most likely to order pizza at 2 a.m.? Louis
Who sleeps in the latest? Niall
Most likely to start a dance party? Louis
Who sends the most text messages? Harry (about "trivial things")
Most likely to take selfies from their bunk? Niall or Liam