iTunes is a media player computer program, used for playing, downloading, saving, and organizing digital music and video files on desktop or laptop personal computers. It can also manage contents on iPod, iPhone, iPod Touch and iPad devices.

iTunes can connect to the iTunes Store to purchase and download music, music videos, television shows, iPod games, audiobooks, podcasts, movies and movie rentals (not available in all countries), and ringtones (only available on iPhone and iPod Touch 4th Generation). It is also used to download application software from the App Store for the iPhone, iPad and iPod Touch. iTunes has been criticized for not being able to transfer music from one portable device to another.

iTunes was introduced by Apple Inc. on January 9, 2001. The latest version, 10.6.1, is available as a free download for Mac OS X v10.5 or later, as well as Windows XP or later. In June 2010, Apple released a new privacy policy pertaining to the capture and collection of users' real-time location information. The information had been included in various device-specific EULAs since 2008, but was not included in Apple's general privacy policy until 2010.

Christina Judith Perri (born August 19, 1986) is an American singer-songwriter and musician from Philadelphia. Her song "Jar of Hearts" charted in the United States after it was featured on the Fox television show So You Think You Can Dance in 2010. Rolling Stone named her the "Band of the Week" on October 26, 2010. On May 10, 2011, Perri's "Jar of Hearts" was featured on Glee (Season 2, Episode 20 "Prom Queen"). Also, on June 27, 2011, Perri's "Jar of Hearts" was featured on Switched at Birth (Season 1, Episode 4 "Dance Amongst Daggers"). One of her songs, "A Thousand Years", has been in the Twilight saga movie Breaking Dawn.

Perri grew up in Bensalem, Pennsylvania (a suburb of Philadelphia) with her older brother, Nick Perri, who formerly played guitar with Shinedown, Silvertide, Perry Farrell and Matt Sorum. Her father is from Italy. She attended Archbishop Ryan High School as a member of the class of 2004. She taught herself how to play guitar as a 16-year-old by watching a videotape of Shannon Hoon from the group Blind Melon performing on VH1.

John Roger Stephens (born December 28, 1978), better known by his stage name John Legend, is an American singer-songwriter and actor. He has won nine Grammy Awards, and in 2007, he received the special Starlight award from the Songwriters Hall of Fame.

Prior to the release of his debut album, Stephens' career gained momentum through a series of successful collaborations with multiple established artists. Stephens added his voice to those of other artists, assisting in them reaching chart-topper hits. He lent his voice to Kanye West's All of the Lights, on Slum Village's "Selfish" and Dilated Peoples' "This Way". Other artists included Jay-Z's "Encore", and he sang backing vocals on Alicia Keys' 2003 song "You Don't Know My Name" and Fort Minor's "High Road." Stephens played piano on Lauryn Hill's "Everything Is Everything."

Stephens was born on December 28, 1978, in Springfield, Ohio. He is the son of Phyllis, a seamstress, and John Mills, a factory worker and former National Guardsman. Throughout his childhood, Stephens was homeschooled on and off by his mother. At the age of four, he began playing the piano and at the age of seven, he performed with his church choir. When he was ten, his parents divorced, causing his mother to suffer a breakdown. At the age of 12, Stephens attended North High School, from which he graduated four years later. He graduated salutatorian.

Edward Christopher "Ed" Sheeran (born 17 February 1991) is an English singer-songwriter who is currently signed to Asylum / Atlantic Records. Sheeran broke through commercially in June 2011, when his debut single "The A Team" debuted at number 3 on the UK chart.

Sheeran was born in Halifax, West Yorkshire to Irish and English parents, before moving to Framlingham, Suffolk; he is a cousin of TV journalist and presenter Gordon Burns. He learned guitar at a very young age, and began writing songs during his time at Thomas Mills High School in Framlingham. His early childhood memories, referred to in a interview on the Zane Lowe show, included listening to Van Morrison on his countless trips to London with his parents and going to an intimate gig with Damien Rice in Ireland when he was 11. He also opened for Nizlopi in Norwich in April 2008 after being one of their guitar technicians. Sheeran began recording in 2005, which led to the release of his first EP, The Orange Room EP. Sheeran also released 2 albums, a self-titled one in 2006 and Want Some? in 2007. He moved to London in 2008 to play gigs, starting off in very small venues, playing every day, to as little as five people. In 2008, he auditioned for the ITV series Britannia High.

Jason Mraz ( /məˈræz/; born June 23, 1977 in Mechanicsville, Virginia) is an American singer-songwriter. Mraz released his debut album, Waiting for My Rocket to Come, which contained the hit single "The Remedy (I Won't Worry)", in 2002, but it was not until the release of his second album, Mr. A-Z, in 2005, that Mraz achieved major commercial success. The album peaked at number five on the Billboard 200 and sold over 100,000 copies in the US. In 2008, Mraz released his third studio album, We Sing. We Dance. We Steal Things. The album debuted at number three on the Billboard 200 and was a commercial success worldwide, peaking in the top ten of many international charts.

Mraz's international breakthrough came with the release of the single "I'm Yours" from the album We Sing. We Dance. We Steal Things. The single peaked at number six on the Billboard Hot 100, giving Mraz his first top ten single. The song was on the Hot 100 for 76 weeks, beating the previous record of 69 weeks held by LeAnn Rimes' "How Do I Live". The song was a huge commercial success in the US, receiving a 5x platinum certification from the RIAA for sales of over five million. The song was successful internationally, topping the charts in New Zealand and Norway and peaking in the top ten of multiple international charts.