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Pop music (a term that originally derives from an abbreviation of "popular") is a genre of popular music which originated in its modern form in the 1950s, deriving from rock and roll.The terms "popular music" and "pop music" are often used interchangeably, even though the former is a description of music which is popular (and can include any style).

As a genre, pop music is very eclectic, often borrowing elements from other styles including urban, dance, rock, Latin and country; nonetheless, there are core elements which define pop. Such include generally short-to-medium length songs, written in a basic format (often the verse-chorus structure), as well as the common employment of repeated choruses, melodic tunes, and catchy hooks.

So-called "pure pop" music, such as power pop, features all these elements, using electric guitars, drums and bass for instrumentation; in the case of such music, the main goal is usually that of being pleasurable to listen to, rather than having much artistic depth. Pop music is generally thought of as a genre which is commercially recorded and desires to have a mass audience appeal.

Michael Jackson

Michael Joseph Jackson (August 29, 1958 – June 25, 2009) was an American singer-songwriter, actor, and businessman. Called the King of Pop, his contributions to music, dance, and fashion, along with his publicized personal life, made him a global figure in popular culture for over four decades.

Britney Spears

Her history:

Britney Jean Spears (born December 2, 1981) is an American recording artist and entertainer. 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.

Backstreet Boys

His history:

The Backstreet Boys  are an American vocal harmony group, formed in Orlando, Florida in 1993. The group consists of A. J. McLean, Howie Dorough, Nick Carter, Kevin Richardson, and Brian Littrell. They rose to fame with their debut international album, Backstreet Boys (1996). In the following year, they released their second international album Backstreet's Back (1997) and their U.S. debut album which continued the group's success worldwide. They rose to superstardom with their third studio album Millennium (1999) and its follow-up album, Black & Blue (2000).

Madonna

Madonna Louise Ciccone (born August 16, 1958) is an American singer-songwriter, actress, and businesswoman. One of the most prominent cultural icons for over three decades, she has achieved an unprecedented level of power and control for a woman in the entertainment industry. She attained immense popularity by pushing the boundaries of lyrical content in mainstream popular music and imagery in her music videos, which became a fixture on MTV. Madonna is known for continuously reinventing both her music and image, and for retaining a standard of autonomy within the recording industry. Music critics have praised her diverse and innovative musical productions which have also been known to induce controversy. Cited as an influence among numerous artists around the world, she is often referred to as the "Queen of Pop".

New kids on the block

New Kids on the Block (also initialized as NKOTB) are an American boy band from Boston,

Massachusetts, assembled in 1984 by producer Maurice Starr. The bands' original name was Nynuk. The band consists of brothers Jordan and Jonathan Knight, Joey McIntyre, Donnie Wahlberg, and Danny Wood. New Kids on the Block enjoyed success in the late 1980s and early 1990s and have sold more than 80 million records worldwide, making them one of the world's best-selling groups of all time. They won two American Music Awards in 1990 for Favorite Pop/Rock Band, Duo, or Group and Favorite Pop/Rock Album. After having disbanded in 1994, several sful.attempts were made to get the group back together, all of them unsucces