Pharrell Williams' hat - you know the one - has been listed on eBay and has attracted bids in excess of $10,000. The Vivienne Westwood headgear worn at the 2014 Grammy Awards went on sale at 8pm on February 20, 2014 and has 64 bids. The proceeds will go to the educational non-profit organisation, From One Hand to Another.

Pharrell WilliamsPharrell Williams And His Massive, Massive Hat

If you're interested in the 'buffalo hat' and its certificate of authenticity, you've got just over a week, with the listing ending on March 2. 

"I'm giving up the Buffalo hat I wore to the GRAMMYs to help underserved kids get the educational tools they need," Pharrell explained in a statement. "Our organization, From One Hand to Another, is committed to bringing kids experiences that ignite their passions, challenge their minds and prepare them for success."

The vast hat gained internet notoriety during Williams' Grammys appearance earlier this month. 

"It's a Vivienne Westwood Buffalo hat from when she was with Malcolm McLaren," Williams told the Hollywood Reporter. "It's not vintage - I would've been really stylin' if I had one from the 80s."

Pharrell Williams hatPharrell Williams' Hat Will Sell For Thousands

Pharrell - one of the world's most successful artists - has also revealed details of his debut solo album GIRL, which drops on March 3. 

He said: "When Columbia Records presented me with the opportunity to make an album, three things came to mind. One was the sense of overwhelming honour that I felt when I realized that they were interested in partnering with me on the album that I had always dreamt of making. Two, it would have to feel festive and urgent. And three, I instantly knew it would be called G I R L. I hope you like it."

Watch Pharrell Williams' 'Happy' video: