UK Singles Chart

The UK Singles Chart (currently entitled Official Singles Chart) is compiled by the Official Charts Company (OCC), on behalf of the British record industry, listing the top-selling singles in the United Kingdom, based upon physical sales, paid-for downloads and streaming. To be eligible for the chart, a single is currently defined by the Official Charts Company (OCC) as either a 'single bundle' having no more than four tracks and not lasting longer than 25 minutes or one digital audio track not longer than 15 minutes with a minimum sale price of 40 pence. The rules have changed many times as technology has developed, the most notable being the inclusion of digital downloads in 2004 and streaming in 2014.

The full chart is a Top 200, though the OCC website contains the Top 100 only. Some media outlets only list the Top 40 (such as the BBC) or the Top 75 (such as Music Week magazine) of this list. Around 6,500 British retail outlets contribute sales data, as well as most UK online digital-download stores. Unlike charts in the United States, no airplay statistics are used for the official UK Singles Chart. The chart week runs from 00:01 Friday to midnight Thursday, with most UK physical and digital singles being released on Fridays. From 3 August 1969 until 5 July 2015, the chart week ran from 00:01 Sunday to midnight Saturday.

Record chart

A record chart is a ranking of recorded music according to popularity during a given period of time. Examples of music charts are the Hit parade, the Billboard Hot 100 or Top 40.

Many different criteria are used in different charts, including sales of records, cassettes and compact discs, the amount of radio airplay, and since the introduction of digital technology, the number of downloads and the amount of streaming activity.

Some charts are specific to a particular musical genre and most to a particular geographical location (although download charts are not easily pinned down in this way). The most common period of time covered by a chart is one week with the chart being printed or broadcast at the end of this time. Summary charts for years and decades are then calculated from their component weekly charts. Component charts have become an increasingly important way to measure the commercial success of individual songs.

Chart hit

Britney Spears

Britney Jean Spears (born December 2, 1981) is an American singer and actress. Born in McComb, Mississippi, and raised in Kentwood, Louisiana, she performed acting roles in stage productions and television shows as a child before signing with Jive Records in 1997. Spears's first and second studio albums, ...Baby One More Time (1999) and Oops!... I Did It Again (2000), became international successes, with the former becoming the best-selling album by a teenage solo artist. Title tracks "...Baby One More Time" and "Oops!... I Did It Again" broke international sales records. In 2001, Spears released her self-titled third studio album, Britney, and played the starring role in the film Crossroads (2002). She assumed creative control of her fourth studio album, In the Zone (2003), which yielded the worldwide success of the "Toxic" single.

In 2007, Spears's much-publicized personal issues sent her career into hiatus. Her fifth studio album, Blackout, was released later that year, and spawned hits such as "Gimme More" and "Piece of Me". Her erratic behavior and hospitalizations continued through the following year, at which point she was placed under a still ongoing conservatorship. Spears's sixth studio album, Circus (2008), included global chart-topping lead single "Womanizer". Its supporting tour The Circus Starring Britney Spears was one of the highest-grossing global concert tours in 2009.