A hook is a musical idea, often a short riff, passage, or phrase, that is used in popular music to make a song appealing and to "catch the ear of the listener". The term generally applies to popular music, especially rock music, hip hop, dance music, and pop. In these genres, the hook is often found in, or consists of, the chorus. A hook can, in general, be either melodic or rhythmic, and often incorporates the main motif for a piece of music. For example, the melody to the lyric "And I will always love you" in the song "I Will Always Love You" over the I-vi-IV-V progression.^{[citation needed]}

One definition of a hook is "a musical or lyrical phrase that stands out and is easily remembered". Definitions typically include some of the following: that a hook is repetitive, attention-grabbing, memorable, easy to dance to, and has commercial potential and lyrics. A hook has been defined as a "part of a song, sometimes the title or key lyric line, that keeps recurring". Alternatively, the term has been defined as

Hook may refer to:

Music is an art form whose medium is sound and silence. Its common elements are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics, and the sonic qualities of timbre and texture. The word derives from Greek μουσική (mousike; "art of the Muses").

The creation, performance, significance, and even the definition of music vary according to culture and social context. Music ranges from strictly organized compositions (and their recreation in performance), through improvisational music to aleatoric forms. Music can be divided into genres and subgenres, although the dividing lines and relationships between music genres are often subtle, sometimes open to individual interpretation, and occasionally controversial. Within "the arts", music may be classified as a performing art, a fine art, and auditory art. There is also a strong connection between music and mathematics.

To many people in many cultures, music is an important part of their way of life. Ancient Greek and Indian philosophers defined music as tones ordered horizontally as melodies and vertically as harmonies. Common sayings such as "the harmony of the spheres" and "it is music to my ears" point to the notion that music is often ordered and pleasant to listen to. However, 20th-century composer John Cage thought that any sound can be music, saying, for example, "There is no noise, only sound." Musicologist Jean-Jacques Nattiez summarizes the relativist, post-modern viewpoint: "The border between music and noise is always culturally defined—which implies that, even within a single society, this border does not always pass through the same place; in short, there is rarely a consensus ... By all accounts there is no single and intercultural universal concept defining what music might be."

John Towner Williams (born February 8, 1932) is an American composer, conductor, and pianist. In a career spanning almost six decades, he has composed some of the most recognizable film scores in the history of motion pictures, including the Star Wars saga, Jaws, Superman, the Indiana Jones films, E.T. the Extra-Terrestrial, Hook, Jurassic Park, Schindler's List, War Horse, Home Alone and the first three Harry Potter films. He has had a long association with director Steven Spielberg, composing the music for all but two (Duel and The Color Purple) of Spielberg's major feature films.

Other notable works by Williams include theme music for four Olympic Games, NBC Sunday Night Football, the NBC Nightly News, the rededication of the Statue of Liberty, and the television series Lost in Space. Williams has also composed numerous classical concerti, and he served as the principal conductor of the Boston Pops Orchestra from 1980 to 1993; he is now the orchestra's conductor laureate.

Williams has won five Academy Awards, four Golden Globe Awards, seven BAFTA Awards, and 21 Grammy Awards. With 47 Academy Award nominations, Williams is the second most nominated person, after Walt Disney. John Williams was honored with the prestigious Richard Kirk award at the 1999 BMI Film and TV Awards. The award is given annually to a composer who has made significant contributions to film and television music. Williams was inducted into the Hollywood Bowl Hall of Fame in 2000, and was a recipient of the Kennedy Center Honors in 2004.

Christopher "Chris" Willis is an American singer-songwriter and producer. Although initially a gospel singer, he later received international attention for his collaborations with house music artist David Guetta, including on the songs "Just a Little More Love", "Love Don't Let Me Go (Walking Away), "Love Is Gone", "Tomorrow Can Wait", "Everytime We Touch" (with Steve Angello and Sebastian Ingrosso) and "Gettin' Over You", all with Guetta.