Pharrell Williams saw out 2013 with his third UK number one single of the year, Happy.
The 40-year-old previously topped the charts on Daft Punk's Get Lucky and Robin Thicke's Blurred Lines, with writing credits on both.
Happy, a feel-good pop song featured in the hit animation film Despicable Me 2, and comes with a 24 hour-long video.
The chart placing rounds off a successful comeback for Williams, as Blurred Lines and Get Lucky were named the two best-selling singles of 2013 at the beginning of this month.
He is expected to release a second solo album early next year - a follow-up to his 2006 debut In My Mind.
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