Clap Hands! Here Comes Charley! is a popular song, first published in 1925 and written by Billy Rose, Ballard MacDonald and Joseph Meyer, and recorded by several popular singers of the era. A version was recorded by Billy Murray in 1925, whose version has apparently entered the public domain, although this has not been confirmed.
The song saw a revival, of sorts, in the 1970s, when reworked versions appeared in two TV commercials: in the United States for a Hormel product ("Clap hands / Here comes chili / Hormel / The good time chili..."); and in the UK for Cadbury’s drinking chocolate.