Happy (Leona Lewis song)

"Happy" is a song performed by British singer Leona Lewis for her second studio album Echo (2009). It was written by Lewis, Ryan Tedder, Evan Bogart, and produced by Tedder, and it premiered on UK radio on 6 September 2009, and officially released on 15 September 2009, by digital download in the U.S., serving as the album's lead single. Lyrically, it talks about a protagonist, that wants to be happy and seize the day.

It received generally positive reviews from music critics, praising the production and, some of them, calling it a "number one song". The single was promoted in the television programmes America's Got Talent, The X Factor, among others, and on the VH1 Divas concert in 2009. The music video was filmed in Cuba, and describes a woman who is in love with her friend. The song debuted at number 50 on the Billboard Hot 100 selling nearly 52,000 copies in the U.S., while in the UK, it debuted and peaked at number two, being blocked from the top spot by the song "Meet Me Halfway" by The Black Eyed Peas. Moreover, the single reached the top ten in Austria, Germany, Ireland, Japan and Switzerland.