Pharrell Williams has a ''weird'' way of making music.

The 'Happy' hitmaker, who wrote and produced his entire second album 'G I R L', admits he used to ''overthink'' elements of his work.

He told Notion magazine: ''I used to always overthink it because I'm trying to produce myself.

''I'm having to draw from myself, which is so weird, so I'd always overshoot.''

He insists he feels ''comfortable'' singing and performing 'Girl' because it's not about him.

The 41-year-old singer added: ''What's made me feel comfortable about making an album is because it's not about me. It's about girl. I feel comfortable singing it and making it and performing it.''

'G I R L' was released on March 3, 2014 and Pharrell previously said the capitalisation and double-spacing of the record's title reflects society.

Quizzed about the title, he explained: ''Because when you look at it, it looks a little weird [...] because society is a little unbalanced.''

The lead single from the album is Academy Award-nominated 'Happy', from the 'Despicable Me 2' soundtrack, and it was commercially successful, peaking at number one on the US Billboard Hot 100.