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]}

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.

Samantha Sang is a stage name of Australian singer, Cheryl Lau Sang, (born 5 August 1951) from Melbourne, who had an earlier career as Cheryl Gray. She had a number eight hit in Australia with "You Made Me What I Am" in 1967. By 1969, she had relocated to United Kingdom and worked with Bee Gees but then returned to Australia in 1975. Sang reconnected with Bee Gees in 1977 and had a number three hit with their song, "Emotion", on the Billboard Hot 100 in 1978, which also charted in Australia peaking at number two, and in the United Kingdom at number eleven. The related album, Emotion reached the top 30 on Billboard 200 and included two other Hot 100 singles.

Samantha Sang was born as Cheryl Lau Sang on 5 August 1951 to Reg Sang and Joan (née Clarke) in Melbourne, Australia. Sang is the great great granddaughter of a Chinese herbalist and surgeon. Reg ran a singing school and performed professionally as Reg Gray. Sang began her career, at the age of eight, by singing on Australian radio. She entered and won talent contests. In December 1966, Sang released her debut single, "The Real Thing" (not to be confused with fellow Australian Russell Morris' 1969 hit song, "The Real Thing") under the name Cheryl Gray. It was issued by EMI Records on their HMV label and was quickly followed by her second single, "In a Woman's Eyes". Her third single, "You Made Me What I Am", was released in May 1967 and reached number eight on the Go-Set Top 40. Teen magazine, Go-Set ran a poll in August for pop performers and Gray was voted third in the 'Top Girl Singer' category behind Lynne Randell and Bev Harrell. Sang released three more singles on HMV but none charted. She became a singer on Australian television, but she felt her career was limited if she remained in Australia.

Céline Marie Claudette Dion, CC OQ, (French pronunciation: [selin djɔ̃] ( listen); born March 30, 1968), is a Canadian singer. Born to a large family from Charlemagne, Quebec, Dion emerged as a teen star in the French-speaking world after her manager and future husband René Angélil mortgaged his home to finance her first record. In 1990, she released the English-language album Unison, establishing herself as a viable pop artist in North America and other English-speaking areas of the world.

Dion had first gained international recognition in the 1980s by winning both the 1982 Yamaha World Popular Song Festival and the 1988 Eurovision Song Contest. Following a series of French albums in the early 1980s, she signed on to CBS Records Canada in 1986. During the 1990s, with the help of Angélil, she achieved worldwide fame after signing with Epic Records and releasing several English albums along with additional French albums, becoming one of the most successful artists in pop music history. However, in 1999 at the height of her success, Dion announced a hiatus from entertainment in order to start a family and spend time with her husband, who had been diagnosed with cancer. She returned to the top of pop music in 2002 and signed a three-year (later extended to almost five years) contract to perform nightly in a five-star theatrical show at the Colosseum at Caesars Palace, Paradise, Nevada.

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).