The band teased on Twitter this morning, "Ready for ANOTHER surprise....?"
In a special video message, the 1D guys explained that those who pre-ordered Four can unlock a new track by reaching some target numbers on Instagram, Facebook, Twitter and Tumblr. Pretty easy - when you dust off the cobwebs on that Facebook account, that is.
Here are the goals:
Twitter: 40,000 retweets
Facebook: 40,000 shares
Instagram: 4,000 comments
Tumblr: 4,000 reblogs
Easy peasy. One Direction gave an update on fans reaching the goals: