1D's album 'Four' will be 'most personal record' yet

One Direction's new album 'Four' will be the boy band's "most personal record" yet, it has been revealed.

According to a source, the fab five, who are very serious about recording their best album yet, have been writing individually and together in different pairs, Metro.co.uk reported.

The insider added that the 'They Don't Know About Us' artists, who are working with some new producers like Naughty Boy, built a recording studio to take it along during their recent world tour.

'Four' is set to release on November 17.