Somatosensory system is a diverse sensory system composed of the receptors and processing centres to produce the sensory modalities such as touch, temperature, proprioception (body position), and nociception (pain). The sensory receptors cover the skin and epithelia, skeletal muscles, bones and joints, internal organs, and the cardiovascular system. While touch (also, more formally, tactition; adjectival form: "tactile" or "somatosensory") is considered one of the five traditional senses, the impression of touch is formed from several modalities. In medicine, the colloquial term touch is usually replaced with somatic senses to better reflect the variety of mechanisms involved.

The system reacts to diverse stimuli using different receptors: thermoreceptors, nociceptors, mechanoreceptors and chemoreceptors. Transmission of information from the receptors passes via sensory nerves through tracts in the spinal cord and into the brain. Processing primarily occurs in the primary somatosensory area in the parietal lobe of the cerebral cortex.

Simon Phillip Cowell (born 7 October 1959) is an English A&R executive, television producer, entrepreneur, and television personality. He is known in the United Kingdom and United States for his role as a talent judge on TV shows such as Pop Idol, The X Factor, Britain's Got Talent and American Idol. He is also the owner of the television production and music publishing house Syco.

As a judge, Cowell is known for his blunt and often controversial criticisms, insults and wisecracks about contestants and their abilities. He is also known for combining activities in both the television and music industries, having promoted singles and records for various artists, including television personalities. He was most recently featured on the fifth series of Britain's Got Talent and the first season of The X Factor USA.

In 2010, the British magazine New Statesman listed Cowell at number 41 in a list of "The World's 50 Most Influential Figures 2010".

Cowell was born in Lambeth, London and brought up in Elstree, Hertfordshire. His mother, Julie Brett (née Josie Dalglish), is a former ballet dancer and socialite, and his father, Eric Selig Phillip Cowell (1918–1999), was an estate agent developer and music industry executive. Cowell's father was from a mostly Jewish family, though he did not discuss his background with his children (Cowell's paternal grandmother had immigrated from Poland). Cowell's mother was from a Christian background, and is of part Scottish descent. He has one brother and three half-brothers and a half sister; younger brother Nicholas Cowell, half-brother John Cowell, half-brother Tony Cowell, half-brother Michael Cowell and half sister June Cowell.

Demetria Devonne "Demi" Lovato (born August 20, 1992) is an American singer-songwriter, musician, and actress. Her earliest roles included Angela on Barney & Friends, before she became better known for her starring roles in the Camp Rock movies, as Sonny Munroe in the Disney sitcom Sonny with a Chance, and as the star of the 2009 movie Princess Protection Program. She is also involved in philanthropic activities through charity work and various social and environmental causes.

As a solo musical artist, Lovato released her debut album Don't Forget on September 23, 2008. The album debuted at number two on the Billboard 200 selling 89,000 copies in the first week. It has since shipped over 500,000 copies, earning a gold certification in the United States. Lovato released her second album, Here We Go Again, on July 21, 2009. The album debuted at number one on the Billboard 200, selling 108,000 copies in the first week. Her third studio album, Unbroken, was released on September 20, 2011 and peaked at number four on the Billboard 200. She is working on her fourth studio album.