"Happy" is a song written, produced, and performed by American singer-songwriter Pharrell Williams, released as the only single from the soundtrack album for the film Despicable Me 2 (2013). The song was first released on November 21, 2013, alongside a long-form music video. The song was reissued on December 16, 2013, by Back Lot Music under exclusive license to Columbia Records, a division of Sony Music. The song also served as the lead single from Williams's second studio album, Girl (2014).

Pharrell Lanscilo Williams, often known mononymously as Pharrell, is an American record producer, singer, songwriter, rapper, and fashion designer. He first became known as one half of the hip hop and R&B production duo the Neptunes, which he formed in 1992 with Chad Hugo. They produced 15 singles which peaked within the top ten of the Billboard Hot 100, including four songs that peaked atop the chart. He also formed the alternative band N.E.R.D. with Hugo and drummer Shay Haley in 1999, for which Williams serves as lead vocalist. He has been considered one of the most influential music producers of the 21st century for his impact on popular music.