"Unchained Melody" is a 1955 song with music by Alex North and lyrics by Hy Zaret. North wrote the music as a theme for the prison film Unchained (1955), hence the song title. Todd Duncan sang the vocals for the film soundtrack. It has since become a standard and one of the most recorded songs of the 20th century, most notably by the Righteous Brothers in 1965. According to the song's publishing administrator, over 1,500 recordings of "Unchained Melody" have been made by more than 670 artists, in multiple languages.
The Billboard Hot 100 is the music industry standard record chart in the United States for songs, published weekly by Billboard magazine. Chart rankings are based on sales, online streaming, and radio airplay in the U.S.
The Billboard charts tabulate the relative weekly popularity of songs and albums in the United States and elsewhere. The results are published in Billboard magazine. Billboard biz, the online extension of the Billboard charts, provides additional weekly charts, as well as year-end charts. The two most important charts are the Billboard Hot 100 for songs and Billboard 200 for albums, and other charts may be dedicated to a specific genre such as R&B, country, or rock, or they may cover all genres. The charts can be ranked according to sales, streams, or airplay, and for main song charts such as the Hot 100 song chart, all three data are used to compile the charts. For the Billboard 200 album chart, streams and track sales are included in addition to album sales.
A record chart, in the music industry, also called a music chart, is a ranking of recorded music according to certain criteria during a given period. Many different criteria are used in worldwide charts, often in combination. These include record sales, the amount of radio airplay, the number of downloads, and the amount of streaming activity.
Airplay is how frequently a song is being played through broadcasting on radio stations. A song which is being played several times every day (spins) would have a significant amount of airplay. Music which became very popular on jukeboxes, in nightclubs and at discotheques between the 1940s and 1960s would also have airplay.
Hot Country Songs is a chart published weekly by Billboard magazine in the United States.
Billboard Year-End charts are cumulative rankings of entries in Billboard magazine charts in the United States in any given chart year. Several hundred Year-End charts are now published by Billboard, the most important of which are the single or album charts based on Hot 100 and Billboard 200 respectively.
"Last Dance" is a song by American singer Donna Summer from the soundtrack album to the 1978 film Thank God It's Friday. It was written by Paul Jabara, co-produced by Summer's regular collaborator Giorgio Moroder and Pete Bellotte, and mixed by Grammy Award-winning producer Stephen Short, whose backing vocals are featured in the song.
Country Airplay is a chart published weekly by Billboard magazine in the United States since October 20, 2012, although the magazine also retrospectively recognizes the Hot Country Songs charts from January 20, 1990, through October 13, 2012, as part of the history of the Country Airplay listing. The chart lists the 60 most-listened-to records played on 150 mainstream country radio stations across the country as monitored by Nielsen BDS, weighted to each station's Nielsen ratings.
