'Happy' was Pharrell's final song - the crowd had been waiting all day for it, and went wild! This image appears in the gallery:Pharrell Williams Live At The Summertime Ball 2014 8. 'Happy' was Pharrell's final song - the crowd had been waiting all day for it, and went wild! Picture: PA 12 images See the full gallery: Pharrell Williams Live At The Summertime Ball 2014