Emotions are the various bodily feelings associated with mood, temperament, personality, disposition, and motivation and also with hormones such as dopamine, noradrenaline, and serotonin. Motivations direct and energize behavior, while emotions provide^{[clarification needed]} the affective component to motivation, positive or negative. Emotions are defined as feeling states with physiological, cognitive, and behavioral components (Carlson & Hatfield, 1992). Strong emotions arouse the autonomic nervous system (Gomez et al, 2005). The greater the arousal the more intense the emotion. It also appears that the type of arousal affects the emotion being experienced. Although the work emotion might seem to be about feeling and not about thinking, cognitions-particularly interpretations of the meanings of events--are important aspects of emotions. Fear, which usually occurs in response to a threat, involves cognitions that one is in danger as well as arousal of the sympathetic nervous system (e.g. rapid heartbeat and breathing, sweating, muscle tension). Emotions also involve behavioral tendencies. No definitive emotion classification system exists, though numerous taxonomies have been proposed. Some categorizations include:^{[citation needed]}

Mariah Carey (born March 27, 1970) is an American singer, songwriter, record producer, and actress. She made her recording debut in 1990 under the guidance of Columbia Records executive Tommy Mottola, and released her self-titled debut studio album, Mariah Carey. The album went multi-platinum and spawned four consecutive number one singles, on the U.S. Billboard Hot 100 chart. Following her marriage to Mottola in 1993, a series of hit records, including Emotions (1991), Music Box (1993) and Merry Christmas (1994), established her position as Columbia's highest-selling act. Daydream (1995), made music history when the second single, "One Sweet Day" a duet with Boyz II Men, spent a record sixteen weeks on top of the Billboard Hot 100, and remains the longest running number one song in US chart history. During the recording of the album Carey began to deviate from her pop background, and slowly traversed into R&B and Hip-hop. After her separation from Mottola, this musical change was evident with the release of Butterfly (1997).

The Bee Gees were a musical group founded in 1958. The group's line-up consisted of brothers Barry, Robin, and Maurice Gibb. The trio were successful for most of their decades of recording music, but they had two distinct periods of exceptional success: as a pop act in the late 1960s/early 1970s, and as prominent performers of the disco music era in the late 1970s.

The group sang three-part tight harmonies that were instantly recognisable; Robin's clear vibrato lead was a hallmark of their earlier hits, while Barry's R&B falsetto became their signature sound during the late 1970s and 1980s. The brothers wrote all of their own hits, as well as writing and producing several major hits for other artists.

Born in the Isle of Man to English parents, the Gibb brothers lived their first few years in Chorlton, Manchester, England, then moved in the late 1950s to Redcliffe, Queensland, Australia, where they began their musical careers. After achieving their first chart success in Australia with "Spicks and Specks" (their 12th single), they returned to the United Kingdom in January 1967 where producer Robert Stigwood began promoting them to a worldwide audience.