Pharrell Williams weds Helen Lasichanh

ANI| Updated: Oct 14, 2013, 15:21 PM IST

Washington: Pharrell Williams has tied the knot with his longtime girlfriend Helen Lasichanh.

Usher and Busta Rhymes attended the wedding ceremony and also put on a mini-concert for the newlyweds, Radar Online reported.

Robin Thicke, whose hit track ` Blurred Lines` was co-written and produced by Williams, was not present at the wedding.

Williams and Lasichanh have a son together.