Gary Allan Herzberg (born December 5, 1967) is an American country music artist, known professionally as Gary Allan.

Signed to Decca Records in 1996, Allan made his debut on the United States country music scene with the release of his single "Her Man", the lead-off to his gold-certified debut album Used Heart for Sale, which was released in 1996 on Decca Records. A second album, It Would Be You, followed in 1998 on Decca. Allan's third album, Smoke Rings in the Dark, was his first album for MCA Nashville (to which he has been signed ever since) and the first platinum album of his career. Its successors, Alright Guy (2001) and See If I Care (2003), were all certified platinum as well, while 2005's Tough All Over and 2007's Greatest Hits were both certified gold. A seventh studio album, Living Hard, was released later in 2007.

Overall, Allan's seven studio albums and Greatest Hits package have produced 24 singles on the Billboard Hot Country Songs charts, including three that reached Number One: "Man to Man" and "Tough Little Boys" in 2003, and "Nothing On but the Radio" in 2004. Seven more of his singles have reached the Top Ten on this chart as well: "Her Man", "It Would Be You", "Right Where I Need to Be", "The One", "Best I Ever Had" (a cover of a Vertical Horizon song), "Life Ain't Always Beautiful", and "Watching Airplanes". Allan's latest album, Get Off on the Pain, was released on March 9, 2010.

The Script are an Irish rock band from Dublin. Based in London after signing to Sony Label Group imprint Phonogenic, the band released their eponymous debut album in August 2008, featuring the hit songs "The Man Who Can't Be Moved" and "Breakeven". The album debuted at number one in Ireland and the UK. Their second album, Science & Faith, was released in September 2010, and contains the hit songs "For the First Time" and "Nothing". The album debuted at number one in Ireland and the UK, and number three on the US Billboard 200.

Their music has been featured in many video games and many popular television programs including 90210, Ghost Whisperer, The Hills, Waterloo Road, EastEnders, Made in Chelsea and The Vampire Diaries. Frontman Danny O'Donoghue is also a coach on The Voice UK.

Danny O'Donoghue and Mark Sheehan met in a club in The Liberties area of Dublin, Ireland near the Guinness brewery, gravitating to each other through a shared liking of music, and in particular a love of R & B music (Rhythm and Blues). "At that time, MTV only came on in Dublin after midnight, it was the fuzzy channel, and for my generation urban culture was just a wave through us all," explains Sheehan. "It wasn't about gangs and guns; it was fashion and fun, singing and dancing."

Sarah Ann McLachlan, OC, OBC (born January 28, 1968) is a Canadian musician, singer and songwriter. Known for her emotional ballads and mezzo-soprano vocal range, as of 2009, she has sold over 40 million albums worldwide. McLachlan's best-selling album to date is Surfacing, for which she won two Grammy Awards (out of four nominations) and four Juno Awards. In addition to her personal artistic efforts, she founded the Lilith Fair tour, which showcased female musicians. The Lilith Fair concert tours took place from 1997 to 1999, and resumed in the summer of 2010. Since 2006 she has also been known as a highly visible supporter of the ASPCA, as well as various other charities.

Sarah McLachlan was born on January 28, 1968, and adopted in Halifax, Nova Scotia, Canada. As a child, she took voice lessons, along with studies in classical piano and guitar. When she was 17 years old and still a student at Queen Elizabeth High School, she fronted a short-lived rock band called The October Game. One of the band's songs, "Grind", credited as a group composition, can be found on the independent Flamingo Records release Out of the Fog and the CD Out of the Fog Too. It has yet to be released elsewhere. Her high school yearbook predicted that she was "destined to become a famous rock star."

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.

Katheryn Elizabeth Hudson (born October 25, 1984), known by her stage name Katy Perry, is an American singer, songwriter and actress. Perry grew up with gospel music, and during her first year of high school she pursued a music career as Katy Hudson, releasing her first studio album called Katy Hudson which failed to chart. She recorded a solo album later, which was never released. After signing with Capitol Music Group in 2007, her fourth record label in seven years, she adopted the stage name Katy Perry.

She first gained recognition with the release of her first mainstream album, One of the Boys in 2008, which spawned three Billboard Hot 100 top-ten songs—"I Kissed A Girl", "Hot n Cold" and "Waking Up In Vegas". Perry supported the album with her Hello Katy Tour. In 2010, her third studio album, Teenage Dream (2010), which topped the Billboard 200 chart, and spawned five number one singles—"California Gurls", "Teenage Dream", "Firework", "E.T." and "Last Friday Night (T.G.I.F.)"—Teenage Dream was the only album (after Michael Jackson's Bad)—to do so, and the first female in history to achieve this milestone. She embarked on the California Dreams Tour, which grossed nearly $60 million worldwide. Perry re-released the album under the name of Teenage Dream: The Complete Confection on March 26, 2012, and the re-release has already spawned the number-one single "Part of Me".