Pop music is a music genre that features a noticeable rhythmic element, melodies and hooks, a mainstream style and a conventional structure. The term "pop music" was first used in 1926 in the sense of "having popular appeal" (see popular music), but since the 1950s it has often been used colloquially to designate an ostensibly separate musical genre, sometimes perceived as a "lighter" alternative to other forms of popular music, such as rock and roll. The standard format of pop music is the song, customarily less than five minutes in duration, with instrumentation that can range from an orchestra to a lone singer.
Pop songs are generally marked by a consistent and noticeable rhythmic element, a mainstream style and traditional structure. Common variants include the verse-chorus form and the thirty-two-bar form, with a focus on melodies and catchy hooks, and a chorus that contrasts melodically, rhythmically and harmonically with the verse.