Historical clue formulations

• One-named singer with the 2019 #1 hit "Without Me" — 2021-05-11
• W.W. II admiral nicknamed "Bull" — 2019-05-12
• Title admiral in a Paul and Linda McCartney hit — 2010-04-15
• Vice admiral on the U.S.S. Enterprise — 2010-03-20
• Admiral at Guadalcanal, 1943 — 2005-11-18
• Admiral nicknamed "Bull" — 1994-06-12