Singing is the act of producing musical sounds with the voice, and augments regular speech by the use of both tonality and rhythm. One who sings is called a singer or vocalist. Singers perform music known as songs that can be sung either with or without accompaniment by musical instruments. Singing is often done in a group of other musicians, such as in a choir of singers with different voice ranges, or in an ensemble with instrumentalists, such as a rock group or baroque ensemble. As in many respects human song is a form of sustained speech, nearly anyone able to speak can also sing. Singing can be formal or informal, arranged or improvised. It may be done for pleasure, comfort, ritual, education, or profit. Excellence in singing requires time, dedication, instruction, and regular practice. Professional singers usually build their careers around one specific musical genre, such as classical or rock. They typically take voice training provided by voice teachers or vocal coaches throughout their careers.

Onika Tanya Maraj (born December 8, 1982), known by her stage name Nicki Minaj ( /mɪˈnɑːʒ/), is a Trinidadian-born American rapper and singer-songwriter. She was born in Saint James, Trinidad and Tobago and when she was 5 years of age she moved to the New York City borough of Queens, where she grew up.

After releasing three mixtapes between 2007 and 2009 and being signed to Young Money Entertainment in August 2009, Minaj released her debut album, Pink Friday, in November 2010. It quickly became a commercial success, peaking at number one on the U.S. Billboard 200 and being certified Platinum by the Recording Industry Association of America (RIAA) a month after its release. She became the first female solo artist to have seven singles on the Billboard Hot 100 at the same time. Her second single, "Your Love", reached number 1 on the Billboard Hot Rap Songs chart, making Minaj the first female artist to top the chart unaccompanied since 2002. She also became the first female artist to be included on MTV's Annual Hottest MC List. Minaj was named the 2011 Rising Star by Billboard. Her second studio album, Pink Friday: Roman Reloaded was released on April 3, 2012.

Michael Steven Bublé ( /ˈbuːbleɪ/; born 9 September 1975) is an Italian Canadian singer and actor. He has won several awards, including three Grammy Awards and multiple Juno Awards. His first album reached the top ten in Canada and the UK. He found a worldwide audience with his 2005 album It's Time, and his 2007 album Call Me Irresponsible which reached number one on the Canadian Albums Chart, the U.K. Albums Chart, the U.S. Billboard 200 albums chart, the Australian ARIA Albums Chart and several European charts. Bublé has sold more than 30 million albums worldwide.

Michael Bublé was born in the City of Burnaby, British Columbia, Canada to Lewis Bublé, a salmon fisherman, and Amber (née Santagà). He has two younger sisters, Crystal (an actress) and Brandee. He attended Seaforth Elementary School and Cariboo Hill Secondary School. According to an Oprah interview on 9 October 2009, Bublé dreamed of becoming a famous singer since age two. When he was a teenager, he slept with his Bible and prayed to become a singer. Bublé's interest in jazz music began around age five when his family played Bing Crosby's White Christmas album at Christmas time. The first time that his family noticed his singing talent was at Christmas time when Bublé was 13 years old, and they heard him powerfully sing the phrase "May your days be merry and bright" when the family was singing to the song "White Christmas" in a car ride.

Jon Bon Jovi (born John Francis Bongiovi, Jr., March 2, 1962) is an American musician, singer, songwriter, and actor, best known as the founder, occasional rhythm guitarist, and lead singer of rock band Bon Jovi, which was named after him. During his career, he has released two solo albums and eleven studio albums with his band, which to date have sold over 130 million albums worldwide. Тhe band was declared the second richest band for 2011, behind U2, earning an approximate $125 million income. In addition, Jon Bon Jovi is one of the majority-owners of the Philadelphia Soul, a team playing in the Arena Football League. In 2010, President Barack Obama named Jon Bon Jovi to the White House Council for Community Solutions.

As a solo artist, Bon Jovi has received numerous awards for his work, including a Golden Globe and an Academy Award nomination for his solo hit, "Blaze of Glory". He was awarded an honorary Doctorate of Humanities from Monmouth University in 2001. He campaigned for Al Gore in the 2000 Presidential election, John Kerry in the 2004 Presidential election, and Barack Obama in the 2008 Presidential election.

Taylor Alison Swift (born December 13, 1989) is an American singer-songwriter and occasional actress. Raised in Wyomissing, Pennsylvania, Swift moved to Nashville, Tennessee at the age of fourteen to pursue a career in country music. She signed to the independent label Big Machine Records and became the youngest songwriter ever hired by the Sony/ATV Music publishing house. The release of Swift's self-titled debut album in 2006 established her as a country music star. "Our Song", her third single, made her the youngest sole writer and singer of a number one song on the country chart. She received a Best New Artist nomination at the 50th Grammy Awards.

Swift's second album, Fearless, was released in late 2008. Buoyed by the chart success of the singles "Love Story" and "You Belong with Me", Fearless attracted a crossover audience and became the top-selling album of 2009. The record won four Grammy Awards, with Swift becoming the youngest ever Album of the Year winner. Fearless also received Album of the Year plaudits at the American Music Awards, Academy of Country Music Awards and Country Music Association Awards, making it the most awarded album in country music history. In 2010, Swift released her third album, Speak Now, which sold over one million copies in its first week. She then embarked on the 111-date Speak Now World Tour, which was attended by over 1.6 million fans and has become one of the highest-grossing concert tours of all time. The album's third single, "Mean", won two Grammy Awards for Best Country Song and Best Country Solo Performance. Swift is currently recording her fourth studio album, due for release in the fall of 2012.