Clap Your Hands Say Yeah (often abbreviated CYHSY) is an American indie rock group based in Brooklyn, New York and Philadelphia, Pennsylvania. The band, whose members met years earlier at Connecticut College, formed in the beginning of 2004 and played shows in Manhattan and Brooklyn. They are notable for achieving their initial fame and commercial success via the internet rather than through a record label.

Their debut album, “Clap Your Hands Say Yeah,” was self-released in 2005. Shortly after the release of the album, they received favorable reviews and attention from numerous blogs. The ensuing demand for the album was so great that the band was forced to repress the record, as the initial production run was too small. They garnered even more press after David Bowie and David Byrne were spotted at some of the band's shows in 2005.

In October 2005, they signed to Wichita Recordings in the U.K. The band released their second album, “Some Loud Thunder” in January 2007. The album was produced by Dave Fridmann, known for his work with Mercury Rev and The Flaming Lips and debuted at #47 on the Billboard 200 Albums chart.

Guitarist and frontman Alec Ounsworth released his solo debut, “Mo Beauty,” in late 2009 while concurrently releasing “Skin and Bones,” the debut album with his other band Flashy Python. Keyboardist Robbie Guertin and bassist Tyler Sargent have been playing in another project called Uninhabitable Mansions, along with Annie Hart from Au Revoir Simone. Recently drummer Sean Greenhalgh has been producing records for a number of bands including Takka Takka, Conversion Party, Sam Izdat, Radial Dads and Tom McBride.

Released in September 2011, their long awaited third album “Hysterical” was produced by John Congleton. The band released “Same Mistake” and “Maniac” as the album’s singles.

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