Mad about plaid! Pharrell Williams and longtime love Helen Lasichanh tie the knot wearing unconventional attire

Plaid affair: Pharrell Williams and his wife Helen Lasichanh celebrated their wedding aboard a yacht in Florida, wearing different tartans

Regal wedding: Helen looked beautiful in a voluminous blue plaid gown

Entertaining guests: Party-goers reportedly were treated to performances by Usher and Busta Rhymes

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