The Used is an American alternative rock band from Orem, Utah. Their sound has been classified under many sub-genres of rock. They signed with Reprise Records in late 2001 and rose to fame in June 2002 after releasing their debut self-titled album, The Used. They followed up with their second album, In Love and Death, in September 2004 and their third album, Lies for the Liars, in May 2007. An EP, Shallow Believer, was released in February 2008 that featured most of the band's B-sides to date. They spent the entire year of 2008 working on their fourth studio album, which was released on August 31, 2009, called Artwork. The band has achieved both Gold and Platinum statuses in more than six countries worldwide.

Joshua Winslow "Josh" Groban (born February 27, 1981) is an American singer-songwriter. He has concentrated his career so far mostly in concert singing and recordings, although he has stated that he wishes to pursue music theatre in the future. As of July 2009, he has sold 19,147,000 albums in the United States alone. Groban received a Grammy for his song Believe and was nominated for an Academy Award in 2005.

Celtic Woman is a musical ensemble comprised of five Irish female artists: vocalists Chloë Agnew, Lynn Hilary, Lisa Kelly, Alex Sharpe and fiddler Máiréad Nesbitt. The group's repertoire ranges from traditional Celtic tunes to modern songs. To date, the group has released four albums, Celtic Woman, Celtic Woman: A Christmas Celebration, Celtic Woman: A New Journey and Celtic Woman: The Greatest Journey and have undertaken a number of world tours.

Jennifer Kate Hudson (born September 12, 1981) is an American recording artist, actress and model. She came to prominence in 2004 as one of the finalists on the third season of the Fox reality television series American Idol. She made her film debut in the 2006 film Dreamgirls and won an Academy Award for Best Supporting Actress for her performance, as well as a Golden Globe Award, a BAFTA Award, an NAACP Image Award and a Screen Actors Guild Award, among many others.

Carrie Marie Underwood (born March 10, 1983) is an American country singer and songwriter from Checotah, Oklahoma. She rose to fame as the winner of the fourth season of American Idol. She has since become a multi-platinum selling recording artist, a multiple Grammy Award winner, was inducted into the Grand Ole Opry, a three-time Country Music Association and ACM female vocalist winner, and is the reigning Academy of Country Music Awards Entertainer of The Year.

Dashboard Confessional is an American alternative rock band from Boca Raton, Florida, led by singer-songwriter Chris Carrabba. The band started out as Carrabba playing intimately personal acoustic songs by himself, but eventually the outfit became a full band ensemble.