Pharrell's days as a mad hatter may be coming to an end.
The famous and buzzed about Vivienne Westwood hat that the producer, rapper and singer wore at the Grammy Awards is being auctioned on eBay to support his charity.
Bids had reached more than $10,000 by Friday afternoon for the brown fedora, which became a trending topic on Twitter after Pharrell wore it.
Proceeds will support Pharrell's From One Hand to Another charity. It provides arts and educational resources for children.