Music Hall is a type of British theatrical entertainment which was popular between 1850 and 1960. It involved a mixture of popular song, comedy, speciality acts and variety entertainment. The term is derived from a type of theatre or venue in which such entertainment took place. British music hall was similar to American vaudeville, featuring rousing songs and comic acts, while in the United Kingdom the term vaudeville referred to more working-class types of entertainment that would have been termed burlesque in America.

With its origins being found in saloon bars within public houses during the 1830s, Music hall entertainment became increasingly popular with audiences, so much so, that during the 1850s, the public houses were demolished and Music hall theatres were developed in their place. These theatres were designed, chiefly so people could consume food and alcohol and smoke tobacco in the auditorium while the entertainment took place. This differed somewhat from the conventional type of theatre which, up until then, seated the audience in stalls with a separate bar-room. Early Music halls included Canterbury Music Hall in Lambeth and The Middlesex, in Drury Lane, otherwise known as the 'Old Mo'.

Petula Clark, CBE (born 15 November 1932) is an English singer, actress and composer whose career has spanned eight decades.

Clark's professional career began as an entertainer on BBC Radio during World War II. During the 1950s she started recording in French and having international success in both French and English, with such songs as "The Little Shoemaker", "Baby Lover", "With All My Heart" and "Prends Mon Coeur". During the 1960s she became known globally for her popular upbeat hits, including "Downtown", "I Know a Place", "My Love", "Colour My World", "A Sign of the Times", and "Don't Sleep in the Subway". She has sold in excess of 68 million records throughout her career.

Born to English father Leslie Norman Clark and Welsh mother Doris (née Phillips), both nurses at Long Grove Hospital, in Epsom, Surrey, England, she was christened Petula Sally Olwen Clark. Her father Leslie coined her first name, jokingly alleging it was a combination of the names of two former girlfriends, Pet and Ulla. As a child, she sang in the chapel choir and showed a talent for mimicry, frequently impersonating Vera Lynn, Carmen Miranda and Sophie Tucker for the amusement of family and friends. Her father introduced her to theatre when he took her to see Flora Robson in a 1938 production of Mary Tudor; she later recalled that after the performance "I made up my mind then and there I was going to be an actress ... I wanted to be Ingrid Bergman more than anything else in the world." However, her first public performances were as a singer, performing with an orchestra in the entrance hall of Bentall's Department Store in Kingston upon Thames for a tin of toffee and a gold wristwatch, in 1939.

John Clayton Mayer ( /ˈmeɪ.ər/ MAY-ər; (born October 16, 1977) is an American pop and blues rock musician, singer-songwriter, recording artist, and music producer. Born in Bridgeport, Connecticut and raised in Fairfield, Connecticut, he attended Berklee College of Music in Boston. He moved to Atlanta in 1997, where he refined his skills and gained a following, and he now lives in New York City. His first two studio albums, Room for Squares and Heavier Things, did well commercially, achieving multi-platinum status. In 2003, he won a Grammy Award for Best Male Pop Vocal Performance for "Your Body Is a Wonderland."

Mayer began his career performing mainly acoustic rock, but gradually began a transition towards the blues genre in 2005 by collaborating with renowned blues artists such as B. B. King, Buddy Guy, and Eric Clapton, and by forming the John Mayer Trio. The blues influence can be heard throughout his 2005 live album Try! with the John Mayer Trio and his third studio album Continuum, released in September 2006. At the 49th Annual Grammy Awards in 2007 Mayer won Best Pop Vocal Album for Continuum and Best Male Pop Vocal Performance for "Waiting on the World to Change". He released his fourth studio album, Battle Studies, in November 2009. His fifth album, Born and Raised, was released on May 22, 2012. He has sold over 10 million albums in the U.S. and 20 million albums worldwide.

Sara Beth Bareilles ( /bəˈrɛlɪs/ bə-REL-is; born December 7, 1979) is an American singer-songwriter and pianist. She achieved mainstream success in 2007 with the hit single "Love Song", which brought her into the number one spot on the Billboard Pop 100 chart. She has sold over 1 million records in the United States alone and has been nominated for a Grammy Award three times. In the third season of NBC's The Sing-Off, Bareilles was a celebrity judge alongside Ben Folds and Shawn Stockman of Boyz II Men. In February of 2012, VH1 placed Bareilles in the #80 spot of the Top 100 Greatest Women in Music.

Bareilles was born and raised in Eureka, California, the youngest of three daughters of Bonnie Halvorsen (née Capellas), a funeral home worker, and Paul Bareilles, an insurance adjuster. She is of Italian, German, Portuguese, and French descent (she speaks Italian and lived in Italy for a year). Bareilles was raised Catholic and participated in the high school choir, Limited Edition, and local community theater musical productions, including her high school's production of Little Shop of Horrors as Audrey.