State of mind is a term meaning "mood" or "outlook" (see mental state (disambiguation)). It can also mean:

Lin Que (born Linque Ayoung 8 March 1969) is a female hip-hop artist. She graduated from Cathedral High School in Manhattan in 1987.^{[citation needed]} She was a member of the hip-hop collective known as the Blackwatch Movement (which included X Clan) as Isis. She released her debut album Rebel Soul while affiliated with that group in 1990.

Lin Que left X-Clan to work with MC Lyte. No longer Isis, she rhymed as Lin Que and released a couple of singles for SME Records and Elektra Records. She eventually went into A&R work and graphic design, and she appeared briefly in Spike Lee's He Got Game and Ted Demme's Who's the Man?

She collaborated with various artists such as Will Downing, Mary J. Blige, Queen Latifah, MC Lyte, Smif-N-Wessun, the Beatnuts, Monifah, Ce Ce Peniston, and more.

She had a brief stint as a member of the Wu-Tang Clan-affiliated group Deadly Venoms. After leaving the group for business reasons shortly after its debut album was recorded and never released, she remained writing and creating music with producers Sugar Al Cayne, Azteknique, and Ayatollah. She has written for MC Lyte and has been producing music as well.

William Martin "Billy" Joel (born May 9, 1949) is an American pianist, singer-songwriter, and composer. Since releasing his first hit song, "Piano Man," in 1973, Joel has become the sixth best-selling recording artist and the third best-selling solo artist in the United States, according to the RIAA.

Joel had Top 40 hits in the 1970s, 1980s, and 1990s, achieving 33 Top 40 hits in the United States, all of which he wrote himself. He is also a six-time Grammy Award winner, a 23-time Grammy nominee and has sold over 150 million records worldwide. He was inducted into the Songwriter's Hall of Fame (1992), the Rock and Roll Hall of Fame (1999), the Long Island Music Hall of Fame (2006), and the Hit Parade Hall of Fame (2009). In 2008, Billboard magazine released a list of the Hot 100 All-Time Top Artists to celebrate the US singles chart's 50th anniversary, with Billy Joel positioned at No. 23. With the exception of the 2007 songs "All My Life" and "Christmas in Fallujah," Joel stopped recording pop/rock material after 1993's River of Dreams, but he continued to tour extensively until 2010.

Alicia Augello Cook (born January 25, 1981), better known by her stage name Alicia Keys, is an American R&B singer-songwriter, record producer, and actress. Keys was raised by a single mother in the Hell's Kitchen area of Manhattan in New York City. At age seven, Keys began playing the piano. She attended Professional Performing Arts School and graduated at 16 as valedictorian. Keys released her debut album with J Records, having had previous record deals first with Columbia and then Arista Records.

Keys' debut album, Songs in A Minor, was a commercial success, selling over 12 million copies worldwide. She became the best-selling new artist and best-selling R&B artist of 2001. The album earned Keys five Grammy Awards in 2002, including Best New Artist and Song of the Year for "Fallin'". Her second studio album, The Diary of Alicia Keys, was released in 2003 and was also another success worldwide, selling eight million copies. The album garnered her an additional four Grammy Awards in 2005. Later that year, she released her first live album, Unplugged, which debuted at number one in the United States. She became the first female to have an MTV Unplugged album to debut at number one and the highest since Nirvana in 1994.