Christina Aguilera

Sony BMG Music Entertainment was a recorded music company, which was a 50–50 joint venture between the Sony Corporation of America and Bertelsmann AG. The venture’s successor, the again-active Sony Music Entertainment, is 100% owned by the Sony Corporation of America. Sony BMG Music... Entertainment began as the result of a 50–50 joint venture between Sony Music Entertainment and Bertelsmann Music Group completed on March 4, 2004. It is one of the Big Four music companies, and includes ownership and distribution of recording labels such as Arista Records, Columbia Records, Epic Records, J Records, Jive Records, RCA Victor Records, RCA Records, Legacy Recordings, Sonic Wave America, and others. The merger affected all Sony Music and Bertelsmann Music Group companies worldwide except for Japan, where it was felt that it would reduce competition in that country’s music industry significantly. Financial analysts covering the merger anticipated that up to 2,000 jobs would be cut as a result, saving Sony BMG approximately $350 million annually.
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Jazz is a musical style that originated at the beginning of the 20th century in black communities in the Southern United States. It was born out of a... mix of African and European music traditions. Its black African pedigree is evident in its use of blue notes, improvisation, polyrhythms, syncopation and the swung note. From its early development until the present day jazz has also incorporated music from American popular music. As the music has developed and spread around the world it has drawn on many different national, regional and local musical cultures giving rise, since its early 20th century American beginnings, to many distinctive styles: New Orleans jazz dating from the early 1910s, big band swing, Kansas City jazz and Gypsy jazz from the 1930s and 1940s, bebop from the mid-1940s and on down through West Coast jazz, cool jazz, avant-garde jazz, Afro-Cuban jazz, modal jazz, free jazz, Latin jazz in various forms, soul jazz, jazz fusion and jazz rock, smooth jazz, jazz-funk, punk jazz, acid jazz, ethno jazz, jazz rap, cyber jazz, Indo jazz, M-Base, nu jazz, urban jazz and other ways of playing the music. In a 1988 interview, trombonist J.J. Johnson said, "Jazz is restless.
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Pop music 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 , whilst the latter is a specific genre containing qualities of mass appeal. 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 , 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, utilising 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.
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Blues is the name given to both a musical form and a music genre that originated in African-American communities of primarily the "Deep South" of the... United States at the end of the 19th century from spirituals, work songs, field hollers, shouts and chants, and rhymed simple narrative ballads. The blues form, ubiquitous in jazz, rhythm and blues, and rock and roll is characterized by specific chord progressions, of which the twelve-bar blues chord progression is the most common. The blue notes that, for expressive purposes are sung or played flattened or gradually bent in relation to the pitch of the major scale, are also an important part of the sound. The blues genre is based on the blues form but possesses other characteristics such as specific lyrics, bass lines and instruments. Blues can be subdivided into several subgenres ranging from country to urban blues that were more or less popular during different periods of the 20th century. Best known are the Delta, Piedmont, Jump and Chicago blues styles.
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Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has... its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music. Rock music also drew strongly on a number of other genres such as blues and folk, and incorporated influences from jazz, classical and other musical sources. Musically, rock has centered around the electric guitar, usually as part of a rock group with bass guitar and drums. Typically, rock is song-based music usually with a 4/4 time signature utilizing a verse-chorus form, but the genre has become extremely diverse and common musical characteristics are difficult to define. Like pop music, lyrics often stress romantic love but also address a wide variety of other themes that are frequently social or political in emphasis. The dominance of rock by white, male musicians has been seen as one of the key factors shaping the themes explored in rock music. Rock places a higher degree of emphasis on musicianship, live performance, and an ideology of authenticity than pop music.
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