Historical clue formulations

• Mario with the 1951 #1 hit "Be My Love" — 2015-10-05
• Mario who played Enrico Caruso — 2015-08-16
• "The Great Caruso" title role player — 2013-11-23
• Tenor Mario — 2010-01-15
• Caruso player in "The Great Caruso" — 2001-09-23
• Caruso portrayer — 1998-03-08