Ken Tamplin (born December 11, 1963) is an American Christian rock performer and vocal coach. Tamplin is known for his four-octave vocal range and has composed music for television and movies.

Ken began playing guitar at age six and singing at age nine. Despite being raised in a Christian home, he was not openly Christian until some time before he began his musical career. Tamplin overdosed on angel dust four times, used and sold cocaine, hash and other drugs before the age of 14, when he became a Christian again. "I've been on fire for Him ever since", Tamplin was quoted as saying.

Tamplin is one of the founding members of the group Shout, along with Chuck King. He is also the winner of four Dove awards, including Hard Music Album of the Year at the 24th GMA Dove Awards in 1993, for his album Tamplin.

In 2001 Tamplin produced the album Make Me Your Voice, featuring gospel singer Andrae Crouch, to help raise funds for Christian groups working in Sudan.

Tamplin is married with two children. He is cousin to former Van Halen frontman, Sammy Hagar.

Steven Tyler (born Steven Victor Tallaricco; March 26, 1948) is an American singer, songwriter, and multi-instrumentalist, best known as the frontman and lead singer of the Boston-based rock band Aerosmith, in which he also plays the harmonica, and occasional piano and percussion. He is known as the "Demon of Screamin'" due to his high screams and his wide vocal range. He is also known for his on-stage acrobatics. During his high-energy performances, he usually dresses in bright, colorful outfits with his trademark scarves hanging from his microphone stand. In the 1970s, Tyler rose to prominence as the frontman of Aerosmith, which released such milestone hard rock albums as Toys in the Attic and Rocks. In the late 1970s and early 1980s, Tyler had a heavy drug and alcohol addiction, and the band's popularity waned.

He completed drug rehabilitation in 1986 and subsequently maintained sobriety for years, but had a relapse with prescription painkillers in the late 2000s, for which he successfully received treatment in 2009. After Aerosmith launched a remarkable comeback in the late 1980s and early 1990s with the albums Permanent Vacation, Pump, and Get a Grip, Tyler became a household name and has remained a relevant rock icon. As a result, he has since embarked on several solo endeavors including guest appearances on other artists' music, film and TV roles (including as a judge on American Idol), authoring a bestselling book, and solo work (including a Top 40 hit single in 2011). However, he has continued to record music and perform with Aerosmith, after more than 41 years in the band. He is included among Rolling Stone's 100 Greatest Singers. He was also ranked 3rd on Hit Parader's Top 100 Metal Vocalists of All Time. In 2001 he was inducted into the Rock and Roll Hall of Fame with Aerosmith, and he was the presenter when AC/DC was inducted into the Hall of Fame in 2003.

Robert Anthony Plant, CBE (born 20 August 1948) is an English singer and songwriter best known as the vocalist and lyricist of the iconic rock band Led Zeppelin. He has also had a successful solo career. In 2007, Plant released Raising Sand, an album produced by T-Bone Burnett with American bluegrass soprano Alison Krauss, which won the 2009 Grammy Award for Album of the Year at the 51st Grammy Awards.

With a career spanning more than 40 years, Plant is regarded as one of the most significant singers in the history of rock music, and has influenced contemporaries and later singers such as Freddie Mercury and Axl Rose. In 2006, heavy metal magazine Hit Parader named Plant the "Greatest Metal Vocalist of All-Time". In 2009, Plant was voted "the greatest voice in rock" in a poll conducted by Planet Rock. In 2011, a Rolling Stone readers' pick placed Plant in first place of the magazine's "Best Lead Singers of All Time".

Plant was born in the Black Country town of West Bromwich (then in Staffordshire now in West Midlands) to parents Robert C. who worked as a civil engineer and Annie C. (Cain) Plant, but grew up in Kidderminster, in Worcestershire. Plant gained an interest in singing and rock and roll music at an early age.