In addition to his main work—performing with Deep Purple and other bands during the 1970s and 1980s—he sang the role of Jesus in the original recording of Andrew Lloyd Webber's rock opera "Jesus Christ Superstar" (1970), performed in the charity supergroup Rock Aid Armenia, and engaged in a number of business investments and ventures, including a hotel, a motorcycle manufacturer, and music recording facilities at Kingsway Studios. More recently, he has performed solo concerts concurrently with his latter career in Deep Purple, and his work and affinity with Armenia, combined with his continued friendship with Tony Iommi since his brief time in Black Sabbath, has led him to form the supergroup WhoCares with Iommi. His solo career outside of Deep Purple was given a comprehensive overview with the "Gillan's Inn" box set in 2006.