Happiness is a mental or emotional state of well-being characterized by positive or pleasant emotions ranging from contentment to intense joy. A variety of biological, psychological, religious, and philosophical approaches have striven to define happiness and identify its sources.

Various research groups, including Positive psychology, endeavor to apply the scientific method to answer questions about what "happiness" is, and how we might attain it.

Philosophers and religious thinkers often define happiness in terms of living a good life, or flourishing, rather than simply as an emotion. Happiness in this sense was used to translate the Greek Eudaimonia, and is still used in virtue ethics.

Happiness economics suggests that measures of public happiness should be used to supplement more traditional economic measures when evaluating the success of public policy.

Happiness is a fuzzy concept and can mean many things to many people. Part of the challenge of a science of happiness is to identify different concepts of happiness, and where applicable, split them into their components.

Alison Sudol (born December 23, 1984), known professionally as A Fine Frenzy, is an American alternative singer-songwriter and pianist. Her debut album, One Cell in the Sea, was released in 2007, followed in 2009 by Bomb in a Birdcage. Sudol's songs have charted in the United States, Germany, Austria, Switzerland, Poland, and France, among other countries. Her music has also been featured on numerous television shows and featured in several major motion pictures. According to her official website, A Fine Frenzy's upcoming album, Pines, will be released in mid- to late-2012.

Born in Seattle, Washington to two dramatic arts teachers, Sudol and both parents moved to Los Angeles after their divorce when she was five years old. She grew up listening to a wide range of music, including Aretha Franklin, Ella Fitzgerald, and swing. She has stated that her roots are "Scottish, Irish, Polish, and 'a bit' of German."

She graduated from high school at the age of 16, and considered herself "nerdy and quiet." Sudol did not "drink or smoke or do anything like that." She stated in an interview "I was so nervous about going into college like that and super young. I figured I would take two years and try to find out what I was doing with music. And when I was 18, I was just so deep into it that I didn't want to stop."

Dikembe Mutombo Mpolondo Mukamba Jean-Jacques Wamutombo (born June 25, 1966), commonly referred to as Dikembe Mutombo, is a retired Congolese American professional basketball player who last played for the Houston Rockets of the NBA. He was the oldest player in the NBA at the time of his most recent season.

The 7 ft 2 in (2.18 m), 260-pound (120 kg; 19 st) center is commonly referred to as one of the greatest shot blockers and defensive players of all time, winning the NBA Defensive Player of the Year Award four times. On January 10, 2007, he surpassed Kareem Abdul-Jabbar as the second most prolific shot blocker, in terms of career blocked shots, in NBA history, behind only Hakeem Olajuwon. He is a member of the Luba ethnic group and speaks English, French, Spanish, Portuguese, Tshiluba, Swahili, Lingala and two other Central African varieties. In the second game of the first round of the 2009 NBA playoffs, Mutombo suffered a knee injury that kept him out for the remainder of the postseason. Soon after the injury, Mutombo announced he had played his last games in the NBA.

William Harrison "Bill" Withers, Jr. (born July 4, 1938) is an American singer-songwriter and musician who performed and recorded from 1970 until 1985. He recorded a number of hits such as "Lean on Me", "Ain't No Sunshine", "Use Me", "Just the Two of Us", "Lovely Day", and "Grandma's Hands". His life was recently the subject of the documentary film Still Bill.

Withers was born the youngest of six children in the small coal-mining town of Slab Fork, West Virginia. Raised in nearby Beckley, West Virginia, Withers was twelve years old when his father died. He enlisted with the United States Navy at age eighteen and served for nine years, during which time he became interested in singing and writing songs. Soon after his discharge from the Navy in 1965, he relocated to Los Angeles in 1967 for a musical career.

Withers worked as an assembler for several different companies, including Douglas Aircraft Corporation, while recording demo tapes with his own money, shopping them around and performing in clubs at night. When he debuted with the song "Ain't No Sunshine" he refused to resign his job because of his belief that the music business was a fickle industry and that he was still a novice compared to other acts.

Joe Bonamassa (born May 8, 1977) is an American blues rock guitarist and singer. He began his career playing guitar in the band Bloodline, which featured the offspring of several famous musicians (such as Miles Davis, Robby Krieger and Berry Oakley of The Allman Brothers Band). He released his first solo album A New Day Yesterday in 2000, and has since released nine more solo studio albums, four live albums and three live DVDs, along with two albums with the band Black Country Communion and one album in collaboration with vocalist Beth Hart. He tours the world regularly, and has developed a large following in the U.K. especially. His most recent album, Driving Towards The Daylight, reached #2 on the U.K. Top 40 Albums Chart, and he completed an arena tour there in 2012. In 2009 he was the recipient of the Classic Rock Magazine "Breakthrough Artist of the Year" award, and The Guardian said of him: "the 32-year-old from upstate New York has consolidated a reputation as the pre-eminent blues-rock guitarist of his generation".