Adam Mitchel Lambert (born January 29, 1982) is an American singer-songwriter and stage actor. Born in Indianapolis but raised in San Diego, Lambert had dreamed of becoming a performer after appearing in numerous amateur productions in his childhood and adolescence. His passion overtook him when deciding to drop out of college, pursue his career, and perform in various professional theatrical productions across the world.

Lambert came to prominence following his appearance on the eighth season of American Idol. Although he was runner-up, Lambert launched a music career with the release of his debut studio album For Your Entertainment (2009) after signing with 19 in a joint venture with RCA. Debuting at number three on the Billboard 200, selling 198,000 copies in the U.S. in its first week, and reaching the top 10 in several countries worldwide, the album subsequently achieved international success with its singles "For Your Entertainment", "Whataya Want from Me" and "If I Had You". Soon after, he embarked on his first headlining worldwide concert tour, Glam Nation, making him the only American Idol contestant to do so in the year following his Idol season. The tour was followed by two live releases: an extended play entitled Acoustic Live! (2010), and a live CD/DVD Glam Nation Live (2011), which debuted at number one on the SoundScan Music Video chart. Lambert took executive producer credit and was a principal writer on his second studio album, Trespassing, which was released to critical acclaim on May 15, 2012.Trespassing made its debut in the number one spot on the Billboard 200 album chart, also topping the Billboard Digital Albums Chart and Canada's Digital Albums Chart.With this accomplishment, Lambert makes music history as the first openly gay artist to achieve the top charting position.

Sir James Paul McCartney, MBE, Hon RAM, FRCM (born 18 June 1942) is an English musician, singer-songwriter and composer. Formerly of the Beatles (1960–1970) and Wings (1971–1981), he has been described by Guinness World Records as "The Most Successful Composer and Recording Artist of All Time", with 60 gold discs and sales of over 100 million albums and 100 million singles. With John Lennon, George Harrison, and Ringo Starr, he gained worldwide fame as a member of the Beatles, and with Lennon formed one of the most celebrated songwriting partnerships of the 20th century. After leaving the Beatles, he began a solo career and later formed the band Wings with his first wife, Linda Eastman, and singer-songwriter Denny Laine.

According to the BBC, his Beatles song "Yesterday" has been covered by over 2,200 artists—more than any other song. Wings' 1977 release, "Mull of Kintyre", became one of the best-selling singles ever in the UK, and he is "the most successful songwriter" in UK chart history, according to Guinness. As a songwriter or co-writer, he is included on thirty-one number one titles on the Billboard Hot 100, and as of 2012 he has sold over 15.5 million RIAA certified units in the United States.

Brian Harold May, CBE (born 19 July 1947) is an English musician and astrophysicist most widely known as the guitarist, songwriter and occasional singer of the rock band Queen. As a guitarist he uses his home-built guitar, "Red Special", and has composed hits such as "Tie Your Mother Down", "I Want It All", "We Will Rock You", "Fat Bottomed Girls" and "Who Wants to Live Forever".

He was made Commander of the Order of the British Empire in 2005 for "services to the music industry and his charity work". May earned a PhD in astrophysics from Imperial College in 2007 and is currently the Chancellor of Liverpool John Moores University. May currently resides in Surrey.

In 2005, a Planet Rock poll saw May voted the 7th greatest guitarist of all time. He was ranked at No. 26 on Rolling Stone magazine's list of the "100 Greatest Guitarists of All Time".

Brian May, the only child of Harold and Ruth May, was born in Hampton, London and attended Hampton Grammar School (now Hampton School). During this time he formed his first band with vocalist and bassist Tim Staffell, named Nineteen Eighty-Four after George Orwell's novel of the same name. He left Hampton Grammar School with ten GCE Ordinary Levels and three Advanced Levels in Physics, Mathematics and Applied Mathematics. He studied Mathematics and Physics at Imperial College London, graduating with B.Sc. degree with honours.