The autism spectrum or autistic spectrum describes a range of conditions classified as pervasive developmental disorders in the Diagnostic and Statistical Manual of Mental Disorders (DSM). Pervasive developmental disorders include autism, Asperger syndrome, pervasive developmental disorder not otherwise specified (PDD-NOS), childhood disintegrative disorder, and Rett syndrome, although usually only the first three conditions are considered part of the autism spectrum. These disorders are typically characterized by social deficits, communication difficulties, stereotyped or repetitive behaviors and interests, and in some cases, cognitive delays. Although these diagnoses share some common features, individuals with these disorders are thought to be "on the spectrum" because of differences in severity across these domains.

Autism is characterized by delays or abnormal functioning before the age of three years in one or more of the following domains: (1) social interaction; (2) communication; and (3) restricted, repetitive, and stereotyped patterns of behavior, interests, and activities. Social impairments are marked by poor use of nonverbal communication, difficulty in peer relations, lack of social-emotional reciprocity, and lack of shared enjoyment. Communication deficits may include failure to develop speech, use of stereotyped or delayed echolalia, and difficulties maintaining conversations. Social and communication impairments may also cause a lack of symbolic or imaginative play. Restricted and repetitive behaviors may include unusual preoccupations with narrow interests, inflexibility to nonfunctional routines, stereotyped and repetitive mannerisms, and preoccupations with parts of objections.

Kathie Lee Gifford (born August 16, 1953) is an American television host, singer, songwriter and actress, best known for her 15-year run (1985–2000) on the talk show Live with Regis and Kathie Lee, which she co-hosted with Regis Philbin. She has received 11 Daytime Emmy nominations and won her first Daytime Emmy in 2010 as part of The Today Show team.

Before her long stint in talk shows, Gifford's first television exposure was that of Tom Kennedy's singer/sidekick on Name That Tune, from 1974-78. On April 7, 2008, Gifford began co-hosting the fourth hour of NBC's Today Show, alongside Hoda Kotb.

Kathie Lee Gifford, born Kathryn Lee Epstein in Paris, France, is the daughter of Joan (née Cuttell; born January 20, 1930), a singer, and Aaron Epstein (March 19, 1924 – November 19, 2002), a musician and former U.S. Navy officer. Aaron Epstein was stationed with his family in France at the time of Gifford's birth. Gifford grew up in Bowie, Maryland, and attended Bowie High School. During high school, Gifford was a singer in a folk group, "Pennsylvania Next Right," which performed frequently at school assemblies. During her senior year at high school she dated and went to the prom with Michael Bray, who would later become an anti-abortion activist who was convicted for acts of terrorism. After high school graduation, Gifford attended Oral Roberts University in Tulsa, Oklahoma, studying drama and music.

Daniel Tammet (born on 31 January 1979) is a British writer and autistic savant. His best selling 2006 memoir, Born on a Blue Day, about his life with high-functioning autism and savant syndrome, was named a "Best Book for Young Adults" in 2008 by the American Library Association.

Tammet's second book, Embracing the Wide Sky, was named one of France's best selling books of 2009 by L'Express magazine in its March 2010 edition.

Tammet's books have been published in 20 languages.

Tammet was born Daniel Paul Corney and raised in East London, England, the eldest of nine children. He suffered epileptic seizures as a young child, which he subsequently outgrew following medical treatment. At age twenty-five, he would eventually be diagnosed with Asperger syndrome by Professor Simon Baron-Cohen of the Autism (Spectrum) Research Centre at Cambridge University. Tammet is one of fewer than a hundred "prodigious savants" according to Dr. Darold Treffert, the world's leading researcher in the study of savant syndrome.

Dan Bull is an English rapper and songwriter known for his politically orientated lyrics and specific addressing of high profile figures in his music. His music has been featured in the British press as part of attempts to save BBC Radio 6, campaign against the Digital Economy Bill, and protest in favour of filesharing.

Dan Bull has released songs on subjects such as digital rights, the music industry, and gaming. Bull's actions have gained attention, specifically from the TalkTalk Group who requested to team up with him against the Digital Economy Bill.

Dan has acquired many of his fans through the creation of gaming raps. He has created songs about Grand Theft Auto V, Minecraft, Assassin's Creed, Star Wars: The Old Republic, Modern Warfare, Mass Effect, League of Legends, and Skyrim. The Epic Skyrim Rap is his most popular video, with over 4.5 million views.

Safe tells the story of a young man who attempts suicide at the same time as a global thermonuclear holocaust and awakens in a new, ambiguous nirvana. Along the way, Dan Bull covers such topics as summer sunshine, friendship, love and loss, alienation, politics, death, religion, suicide and insanity.^{[unreliable source?]}

Katheryn Elizabeth Hudson (born October 25, 1984), known by her stage name Katy Perry, is an American singer, songwriter and actress. Perry grew up with gospel music, and during her first year of high school she pursued a music career as Katy Hudson, releasing her first studio album called Katy Hudson which failed to chart. She recorded a solo album later, which was never released. After signing with Capitol Music Group in 2007, her fourth record label in seven years, she adopted the stage name Katy Perry.

She first gained recognition with the release of her first mainstream album, One of the Boys in 2008, which spawned three Billboard Hot 100 top-ten songs—"I Kissed A Girl", "Hot n Cold" and "Waking Up In Vegas". Perry supported the album with her Hello Katy Tour. In 2010, her third studio album, Teenage Dream (2010), which topped the Billboard 200 chart, and spawned five number one singles—"California Gurls", "Teenage Dream", "Firework", "E.T." and "Last Friday Night (T.G.I.F.)"—Teenage Dream was the only album (after Michael Jackson's Bad)—to do so, and the first female in history to achieve this milestone. She embarked on the California Dreams Tour, which grossed nearly $60 million worldwide. Perry re-released the album under the name of Teenage Dream: The Complete Confection on March 26, 2012, and the re-release has already spawned the number-one single "Part of Me".