Dan McCafferty through the years Dan McCafferty of Nazareth performing on stage at City Hall, Newcastle upon Tyne, 15 May 1974, on tour promoting the album 'Rampant'. (Photo by Ian Dickson/Redferns) (Ian Dickson/Redferns via Getty Images)
Dan McCafferty through the years UNITED KINGDOM - 10th AUGUST: Photo of NAZARETH and Manny CHARLTON and Dan McCAFFERTY and Darrell SWEET and Pete AGNEW; Posed studio group portrait for the Loud 'n' Proud album session. L-R Pete Agnew, Dan McCafferty, Darrell Sweet and Manny Charlton (Photo by Fin Costello/Redferns) (Fin Costello/Redferns via Getty Images)
Dan McCafferty through the years Singer Dan McCafferty of Nazareth performing at the Auditorium Theater in Chicago, Illinois, April 22, 1977. (Photo by Paul Natkin/Getty Images) (Paul Natkin/Getty Images)
Dan McCafferty through the years DUNSTABLE, UNITED KINGDOM - 1st OCTOBER: Scottish rock group Nazareth perform live on stage in Dunstable, England in October 1973. L-R: guitarist Manny Charlton, singer Dan McCafferty and bass player Pete Agnew. (Photo by Fin Costello/Redferns) (Fin Costello/Redferns via Getty Images)
Dan McCafferty through the years Dan McCafferty of Nazareth performing at the Aragon Ballroom In Chicago, Illinois, March 17, 1978. (Photo by Paul Natkin/Getty Images) (Paul Natkin/Getty Images)
Dan McCafferty through the years Narareth, studio group portrait, London, 1974, L-R Pete Agnew, Dan McCafferty, Darrell Sweet, Manny Charlton. (Photo by Michael Putland/Getty Images) (Michael Putland/Getty Images)
Dan McCafferty through the years LONDON - 10th AUGUST: Singer Dan McCafferty from Scottish rock group Nazareth posed for a studio session for the band's 'Loud n' Proud' LP cover session. (Photo by Fin Costello/Redferns) (Fin Costello/Redferns via Getty Images)
Dan McCafferty through the years DETROIT, MI - MARCH 6: Scottish vocalist Dan McCafferty, of the Scottish hard rock band Nazareth, sings on stage during their 1981 The Fool Circle Tour on March 6, 1981 at the Cobo Arena in Detroit, Michigan. (Photo by Ross Marino/Getty Images) (Icon and Image/Getty Images)
Dan McCafferty through the years UNITED KINGDOM - SEPTEMBER 01: Photo of Dan McCAFFERTY; Dan McCafferty appearing with Nazareth at Glasgow Barrowland's Frankie Miller Tribute. 7th Sept 2002 (Photo by Marc Marnie/Redferns) (Marc Marnie/Redferns via Getty Images)
Dan McCafferty through the years BERLIN - MAY 27: Singer Dan McCafferty of the Scottish hard rock band Nazareth performs live during a concert at the Postbahnhof on April 27, 2010 in Berlin, Germany. The concert is part of the tour 2010. (Photo by Jakubaszek/Getty Images) (Jakubaszek/Getty Images)
Dan McCafferty through the years LITTLETON, CO - JUNE 9: Nazareth vocalist Dan McCafferty performs during the Hudson Gardens Summer Concert Series on June 9, 2013 in Littleton, Colorado. The Hudson Garden Concert Series continues through the summer with shows every Sunday. (Photo by Seth McConnell/The Denver Post via Getty Images) (Seth McConnell/Denver Post via Getty Images)
Dan McCafferty through the years UNSPECIFIED - JULY 26: RED ROBINSON THEATRE Photo of NAZARETH and Dan McCAFFERTY, Dan McCafferty performing on stage (Photo by Kevin Statham/Redferns) (Kevin Statham/Redferns via Getty Images)
