Record chart in the context of "The Sting"

Contemporary hit radio (CHR, also known as contemporary hits, hit list, current hits, hit music, top 40, or pop radio) is a radio format common in many countries that focuses on playing current and recurrent popular music as determined by the Top 40 music charts. There are several subcategories, dominantly focusing on rock, pop, or urban music. Used alone, CHR most often refers to the CHR-pop format. The term contemporary hit radio was coined in the early 1980s by Radio & Records magazine to designate Top 40 stations which continued to play hits from all musical genres as pop music splintered into adult contemporary, urban contemporary, contemporary Christian and other formats.

The term "top 40" is also used to refer to the actual list of hit songs, and, by extension, to refer to pop music in general. The term has also been modified to describe top 50; top 30; top 20; top 10; hot 100 (each with its number of songs) and hot hits radio formats, but carrying more or less the same meaning and having the same creative point of origin with Todd Storz as further refined by Gordon McLendon as well as Bill Drake. The format became especially popular in the mid-sixties as radio stations constrained disc jockeys to numbered play lists in the wake of the payola scandal.

Adult contemporary (AC) is category of popular music catered to adult demographics, including record charts and radio formats that are focused on such music.

The exact assemblage of adult contemporary music has varied based on trends in popular music, but has usually encompassed songs within genres popular among audiences that had grown out of music that appeals more to youth and young adult audiences. Adult contemporary was originally established as a continuation of the easy listening and soft rock sounds from the 1960s and 1970s, usually focusing on songs with varying degrees of easy listening, pop, soul, R&B, quiet storm, and rock influence. In the 1990s, adult contemporary began to accommodate a hotter sound more inclusive of contemporary pop songs, and develop sub-categories devoted towards specific genres.

A hit song, also known as a hit record, hit single, or simply hit, is a recorded song or instrumental that becomes broadly popular or well-known. Although hit song means any widely played or big-selling song, the specific term hit record usually refers to a single that has appeared in an official music chart through repeated radio airplay audience impressions or significant streaming data and commercial sales.

Prior to the dominance of recorded music, commercial sheet music sales of individual songs were similarly promoted and tracked as singles and albums are now. For example, in 1894, Edward B. Marks and Joe Stern released The Little Lost Child, which sold more than a million copies nationwide, based mainly on its success as an illustrated song, analogous to what later became music videos.

Music streaming services are a type of online streaming media service that focuses primarily on music, and sometimes other forms of digital audio content such as podcasts. These services are usually subscription-based services allowing users to stream digital copyright restricted songs on-demand from a centralized library provided by the service. Some services may offer free tiers with limitations, such as advertising and limits on use. They typically incorporate a recommendation system to help users discover other songs they may enjoy based on their listening history and other factors, as well as the ability to create and share public playlists with other users.

Streaming services saw a significant pace of growth during the 2010s, overtaking online music stores as the largest source of revenue to the United States music industry in 2015, and accounting for a majority since 2016. As a result of their ascendance, streaming services (as well as music-oriented content on video sharing platforms) were incorporated into the methodologies of major record charts; the "album-equivalent unit" was developed as an alternative metric for the consumption of albums, to account for digital music and streaming.

"Like a Prayer" is a song by American singer Madonna from her 1989 fourth studio album of the same name. It was released as the album's lead single on March 3, 1989, by Sire Records. Written and produced by both Madonna and Patrick Leonard, the song heralded an artistic and personal approach to songwriting for Madonna, who believed that she needed to cater more to her adult audience.

"Like a Prayer" is a pop rock, dance-pop, and gospel song that also incorporates elements of funk. It features background vocals from a choir and also a rock guitar. The lyrics contain liturgical words, but they have been interpreted by some people to have dual meanings of sexual innuendo and religion. "Like a Prayer" was acclaimed by music critics upon release and was a global commercial success, becoming Madonna's seventh No. 1 hit on the US Billboard Hot 100, topping the Hot 100 for three consecutive weeks and also topping the charts in many other countries, including Australia, Brazil, Canada, Italy, Mexico, New Zealand, Spain and the United Kingdom. Rolling Stone listed "Like a Prayer" among "The 500 Greatest Songs of All Time".

The Billboard 200 is a record chart ranking the 200 most popular music albums and EPs in the United States. It is published weekly by Billboard magazine to convey the popularity of an artist or groups of artists. Sometimes, a recording act is remembered for its "number ones" that outperformed all other albums during at least one week. The chart grew from a weekly top 10 list in 1956 to become a top 200 list in May 1967, acquiring its existing name in March 1992. Its previous names include the Billboard Top LPs (1961–1972), Billboard Top LPs & Tape (1972–1984), Billboard Top 200 Albums (1984–1985), Billboard Top Pop Albums (1985–1991), and Billboard 200 Top Albums (1991–1992).

The chart is based mostly on sales—both at retail and digital – of albums in the United States. The weekly sales period was Monday to Sunday when Nielsen started tracking sales in 1991, but since July 2015, the tracking week begins on Friday (to coincide with the Global Release Day of the music industry) and ends on Thursday. A new chart is published the following Tuesday, post dated to the Saturday of that week, four days later. The chart's streaming schedule is also tracked from Friday to Thursday. Digital downloads of albums are included in Billboard 200 tabulation. Albums that are not licensed for retail sale in the United States (yet purchased in the U.S. as imports) are not eligible to chart. A long-standing policy rendering titles that are sold exclusively by specific retail outlets (such as Walmart and Starbucks) ineligible for charting, was reversed on November 7, 2007, and took effect in the issue dated November 17, 2007.

The Billboard Hot 100, also known as simply the 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 (physical and digital), online streaming, and radio airplay in the U.S.

A new chart is compiled and released online to the public by Billboard's website on Tuesdays but post-dated to the following Saturday, when the printed magazine first reaches newsstands. Since July 2015, the weekly tracking period for sales has been Friday–Thursday. It was initially Monday–Sunday when Nielsen started tracking sales in 1991. This tracking period also applies to compiling online streaming data. Radio airplay is readily available on a real-time basis, unlike sales figures and streaming, but is also tracked on the same Friday–Thursday cycle, effective with the chart dated July 17, 2021. Previously, radio was tracked Monday–Sunday and, before July 2015, Wednesday–Tuesday.

The Bar-Kays is an American funk band formed in 1964. The band had dozens of charting singles from the 1960s to the 1980s, including "Soul Finger" (US Billboard Hot 100 number 17, R&B number 3) in 1967, "Son of Shaft" (R&B number 10) in 1972, and "Boogie Body Land" (R&B number 7) in 1980. The Bar-Kays also served as the backing band for a variety of singers, including Isaac Hayes and Otis Redding.

In the music industry, the Top 40 is a list of the 40 currently most popular songs in a particular genre. It is the best-selling or most frequently broadcast popular music. Record charts have traditionally consisted of a total of 40 songs. "Top 40" or "contemporary hit radio" is also a radio format.