Historical clue formulations

• Luke Perry or Jason Priestley, once — 2017-07-03
• Soap dish, possibly? — 2015-10-31
• "Hannah Montana" star Miley Cyrus, for one — 2008-04-20
• Many an "S.N.L." cast member — 2005-03-04
• Small-screen heartthrob — 1999-09-07