Niall Horan's new album was inspired by a secret relationship.

Niall Horan

Niall Horan

The 'This Town' singer tries to keep his personal life out of the spotlight and avoids talking about the subject, so found it helpful to pen his thoughts and feelings into the songs that make up his debut solo LP, 'Flicker'.

He said: "It is written about one person. Most of it is. There's obviously songs that are not particularly about anything, just scenarios I've made up in my head or situations I've seen among my friends.

"But yeah, for the most part it's about that one person.

"I live most of my life out of the public eye. I try to keep as much of it shut as possible, because if you let it out, people start asking you loads of questions and it becomes uncomfortable.

"That's why I wrote the album I did -- because I'm not the greatest talker in terms of emotion. But I found that I'm good at writing it down on paper and putting it on the record. It's still quite a hard thing to do but I found it better to do it that way."

But Niall confirmed he is no longer with the person who inspired the songs.

He added to The Sun newspaper: "I'm single now, yep. Yep. Extremely single."

Despite recently being romantically linked with actress Olympia Valance, Niall insists they just met through mutual friends and "hung out" at a barbecue.

And the former One Direction singer was baffled by talk of a supposed love triangle between himself, friend Ed Sheeran, and Ellie Goulding, a situation which supposedly inspired his pal's song 'Don't'.

He quipped: "It kind of all happened without me knowing and that was it really.

"I can't remember a specific time or a specific moment. It all kind of kicked off and there was a song written about it, apparently."