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John Michael "Ozzy" Osbourne (born 3 December 1948) is an English heavy metal vocalist and songwriter, whose musical career has spanned over 40 years. Osbourne rose to prominence as lead singer of the pioneering English band Black Sabbath, whose dark and hard sound helped spawn the heavy metal genre. Due to Sabbath's dark style, Osbourne became known as the "Prince of Darkness". Osbourne is also known as the "Godfather of Heavy Metal".

In the early 2000s, Osbourne's career expanded when he became a star in his own reality show The Osbournes, alongside wife/manager Sharon and two of their three children, Kelly and Jack. A documentary about his life and career, God Bless Ozzy Osbourne, premiered in April 2011 at the Tribeca Film Festival and was released on DVD in November 2011. Osbourne has achieved multi-platinum status as a solo artist and with Black Sabbath and has sold over 100 million albums worldwide.

John Michael "Ozzy" Osbourne was born in Aston, Birmingham, England, on 3 December 1948. His father Jack worked shifts as a toolmaker at GEC. His mother Lillian worked for the car components firm Lucas. John was the fourth of six children. Ozzy had two brothers (Paul and Tony) and three sisters (Jean, Iris and Gillian); they lived in a small two bedroom home at 14 Lodge Road in Aston. The nickname "Ozzy" was first used when he was in primary school. Although called "John" by his first wife Thelma, Osbourne states that it has been a long time since he's recognised himself when called by his formal name.

Paul Bruce Dickinson (born 7 August 1958) is an English singer, songwriter, airline pilot, fencer, broadcaster, author, screenwriter, actor and former marketing director, best known as the lead vocalist of the heavy metal band Iron Maiden.

Dickinson began his career in music fronting small pub bands at school and University, including Styx (not the American band of the same name) in 1976, Speed, (1977–1978), and Shots in early 1979. He then joined the band Samson later in 1979, where he gained some popularity under the stage name, "Bruce Bruce." He left Samson in 1981 to join Iron Maiden as their new vocalist, replacing Paul Di'Anno, and debuting on their 1982 album The Number of the Beast. During his first tenure in the band, they issued a series of high impact releases, resulting in Dickinson gaining worldwide fame, and becoming one of the most acclaimed heavy metal vocalists of all time.

Dickinson quit Iron Maiden in 1993 in order to pursue his solo career, being replaced by Blaze Bayley, which saw him experiment with a wide variety of heavy metal and rock styles. Dickinson rejoined the band in 1999 along with guitarist Adrian Smith, with whom he released four subsequent studio albums. Since his return to Iron Maiden, Dickinson issued one further solo record in 2005, Tyranny of Souls. He is the older cousin of Rob Dickinson, former lead singer of British alternative rock band Catherine Wheel. His son, Austin, is the lead singer in metalcore band Rise to Remain. On 19 July 2011, Dickinson was presented with an honorary music doctorate from Queen Mary College, in honour of his contribution to the music industry.