▁the ▁album , ▁" Fire proof " ▁was ▁released ▁for ▁free ▁download ▁for ▁ 2 4 ▁hours ▁on ▁their ▁official ▁website . ▁" Ste al ▁My ▁Girl ", ▁the ▁album ' s ▁lead ▁single , ▁was ▁released ▁on ▁ 2 9 ▁September ▁ 2 0 1 4 , ▁ ▁receiving ▁critical ▁acc laim ▁for ▁its ▁classic ▁rock ▁sound . ▁The ▁second ▁single ▁from ▁the ▁album , ▁" N ight ▁Ch anges ", ▁was ▁released ▁on ▁ 1 4 ▁November , ▁three ▁days ▁before ▁the ▁album ' s ▁release . ▁It ▁also ▁achieve ▁plat in um ▁status , ▁s elling ▁over ▁one ▁million ▁units ▁in ▁the ▁United ▁States . ▁Four ▁was ▁released ▁on ▁ 1 7 ▁November ▁ 2 0 1 4 , ▁to pping ▁the ▁Billboard ▁ 2 0 0 ▁and ▁the ▁UK ▁Album ▁Chart . ▁In ▁total , ▁in ▁deb uted ▁at ▁number ▁one ▁in ▁ 1 8 ▁countries , ▁s elling ▁ 3 . 2 ▁million ▁copies . ▁It ▁became ▁the ▁top ▁chart ed ▁album ▁on ▁i T unes ▁in ▁ 6 7 ▁countries . ▁One ▁D irection ▁became ▁the ▁only ▁group ▁in ▁the ▁ 5 8 - year ▁history ▁of ▁the ▁Billboard ▁ 2 0 0 ▁albums ▁chart ▁to ▁have ▁their ▁first ▁four ▁albums ▁debut ▁at ▁number ▁one . ▁In ▁February ▁ 2 0 1 5 , ▁the ▁group ▁emb ark ed ▁on ▁their ▁fourth ▁world ▁tour ▁and ▁second ▁all - stad ium ▁tour , ▁the ▁On ▁the ▁Road ▁Again ▁Tour , ▁gross ing ▁$ 2 0 8 ▁million ,