N.E.R.D. have been in the studio recording the follow-up to 2004's Fly Or Die.

Frontman and producer Pharrell Williams told NME.com that the trio are aiming to release the as-yet-untitled album next spring.

"We're almost done with the album--we're like one song away," said Williams. "We plan to release it next March or April."

Williams, who is also known as a solo artist and part of production duo the Neptunes, said the new album goes back to "what we do."

"It also has a lot to do with pretty girls," he added.