Here's what reportedly went down – a store in Brazil started selling the album in advance of its release date and a fan who bought it uploaded the songs.
We can't say it's all that surprising, but as these things go, fans are divided between waiting for the official album release and listening to some of the leaked songs.
Have you listened to the leaked Four album's songs yet?
Here are some of the fan reactions pouring in on Twitter:
"Four was leaked but in low quality" everybody to the girl rn: pic.twitter.com/nzWBV3ZaJ3- louis from toys r us (@blounourrypie) November 7, 2014
Four got leaked and I don't know whether to feel sad or proud because this is like the third time the One Direction fandom has done this 😂😆- Taylore Deffler (@tayloreaurora) November 7, 2014
BUT YEAH OKAY FOUR GOT LEAKED BUT WE'RE THE ONE DIRECTION FANDOM SO WE'RE STILL WINNING TONS OF AWARDS AND WRECKING THE CHARTS- leoj..!!!, (@handjoubkink) November 7, 2014
IF YOURE COMPLANING ABOUT FOUR BEIN LEAKED DONT WORRY THIS HAS HAPPENED FOR THE PAST THREE YEARS HONEY LMAO AND WHERE THE HELL HAVE YOU BEEN- harry follow bella!! (@haroldcoven) November 7, 2014
ALL IM SAYIN IS LISTEN TO THE LEAKED ALBUM GO AHEAD DONT LISTEN TO IT GO AHEAD BUT FOUR NEEDS TO BE #1 ON THE CHARTS LEAKED OR NOT- nιcole☻ | 271 (@niallerrocking) November 7, 2014