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.

Adam Richard Wiles (born 17 January 1984), better known by his stage name Calvin Harris, is a Scottish DJ, singer, songwriter, and record producer. His gold-selling debut album, I Created Disco, was released in 2007 and contained the top ten singles "Acceptable in the 80s" and "The Girls". His second studio album, Ready for the Weekend (2009), reached number one in the UK Album Chart and includes the chart-topper "I'm Not Alone", the UK top five hit "Ready for the Weekend", and the singles "Flashback" and "You Used to Hold Me".

A remix album titled L.E.D. Festival was released in July 2010 as a free album in the August issue of Mixmag. Harris is currently working on his third studio album—due for release in 2012—which has produced the singles "Awooga", "Bounce", "Feel So Close", and "Let's Go". He has written and produced records for other recording artists including Kylie Minogue, Sophie Ellis-Bextor, Dizzee Rascal, Rihanna (on the international chart topper "We Found Love"), and Kesha.

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.

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.

Hayley Nichole Williams (born December 27, 1988) is an American singer and songwriter. She is the lead vocalist of the American rock band Paramore.

In 2002, at the age of 13, Williams moved from her hometown, Meridian, Mississippi, to Franklin, Tennessee. She met band members Josh and Zac Farro in her new school. While still in school, she tried out for a local funk cover band The Factory, in which she met Jeremy Davis.

Williams was discovered in 2003 by managers Dave Steunebrink and Richard Williams who signed the 14-year-old to a production deal. At the time she was writing pop songs with songwriters in Nashville. Williams was introduced to Atlantic Records A&R Tom Storms through Richard Williams' attorneys Jim Zumwalt and Kent Marcus, and then signed to the label by Jason Flom. The label's original plan for their new artist was to make her a solo pop artist but Williams objected to this, saying that she wanted to be part of a band and play alternative rock music.

Atlantic decided to go along with her wishes, and she then formed Paramore with Josh Farro, Zac Farro, and Jeremy Davis. The music of Paramore was originally supposed to come out on Atlantic Records, but the label's marketing department decided it would be better for the image of the band to not have them attached to a huge label. They instead released their music through a "cooler" niche label, Fueled by Ramen. The debut album was released in 2005 when Hayley was only 16 years old.