Childhood is the age span ranging from birth to adolescence. In developmental psychology, childhood is divided up into the developmental stages of toddlerhood (learning to walk), early childhood (play age), middle childhood (school age), and adolescence (puberty through post-puberty).

The term childhood is non-specific and can imply a varying range of years in human development. Developmentally and biologically, it refers to the period between infancy and puberty. In common terms, childhood is considered to start from birth. Some consider that childhood, as a concept of play and innocence, ends at adolescence. In the legal systems of many countries, there is an age of majority when childhood officially ends and a person legally becomes an adult. The age ranges anywhere from 15 to 21, with 18 being the most common.

Early childhood follows the infancy stage, and begins with toddlerhood when the child begins speaking or taking steps independently. While toddlerhood ends around age three when the child becomes less dependent on parental assistance for basic needs, early childhood continues approximately through years seven or eight. According to the National Association for the Education of Young Children, early childhood spans the human life from birth to age eight.

Michael Joseph Jackson (August 29, 1958 – June 25, 2009) was an American recording artist, entertainer, and businessman. Often referred to as the King of Pop, or by his initials MJ, Jackson is recognized as the most successful entertainer of all time by Guinness World Records. His contribution to music, dance, and fashion, along with a much-publicized personal life, made him a global figure in popular culture for over four decades. The seventh child of the Jackson family, he debuted on the professional music scene along with his brothers as a member of The Jackson 5 in 1964, and began his solo career in 1971.

In the early 1980s, Jackson became a dominant figure in popular music. The music videos for his songs, including those of "Beat It", "Billie Jean", and "Thriller", were credited with transforming the medium into an art form and a promotional tool, and the popularity of these videos helped to bring the relatively new television channel MTV to fame. Videos such as "Black or White" and "Scream" made him a staple on MTV in the 1990s. Through stage performances and music videos, Jackson popularized a number of complicated dance techniques, such as the robot and the moonwalk, to which he gave the name. His distinctive musical sound and vocal style influenced numerous hip hop, post-disco, contemporary R&B, pop and rock artists.

Ricky Dene Gervais (/dʒərˈveɪz/; born 25 June 1961) is an English comedian, actor, director, producer, musician, writer, and former radio presenter.

Gervais achieved mainstream fame with his television series The Office and the subsequent series Extras, both of which he co-wrote and co-directed with frequent collaborator Stephen Merchant. In addition to writing and directing the shows, Gervais played the lead roles of David Brent in The Office and Andy Millman in Extras. Gervais has also starred in a number of Hollywood films, assuming leading roles in Ghost Town and The Invention of Lying. He has performed on four sell-out stand-up comedy tours, written the best-selling Flanimals book series and starred with Merchant and Karl Pilkington in the most downloaded podcast in the world as of March 2009,The Ricky Gervais Show.

He has won multiple awards and honours, including seven BAFTA Awards, five British Comedy Awards, two Emmy Awards, three Golden Globe Awards and the 2006 Rose d'Or, as well as a Screen Actors Guild Award nomination. In 2007 he was voted the 11th greatest stand-up comic on Channel 4's 100 Greatest Stand-Ups and again in the updated 2010 list as the 3rd greatest stand-up comic. In 2010 he was named on the TIME 100 list of the world's most influential people.