Pharrell Williams has admitted to being disappointed by his 2006 debut solo album In My Mind.

The Happy hitmaker told GQ magazine that the lyrical quality of the release wasn't up to scratch and that he was trying to follow in Jay Z's footsteps instead of just being himself, "Talking about the money I was making and the by-products of living that lifestyle.

"What was good about that? What'd you get out of it? There was no purpose. I was so under the wrong impression at that time. I wanted to be Jay. I wanted to be like Puff. Those are their paths. I got my own path. But I didn't know what my path was. I knew that I was meant to do something different. I knew that I needed to inject purpose in my music. And I thought that was my path."

Pharrell looks back on his debut record as a learning curve, "I didn't realise that like, from '08 up until now was like, training. Like, keep putting purpose in everything you do. Don't worry about it, just put purpose in there."

The former N.E.R.D star's track Happy is nominated in the Best Song category at this year's Oscars and his new album G I R L set for release on March 3.