Historical clue formulations

• Early pop music's ___ Brothers — 2026-01-22
• Either brother in an old pop duo — 2023-06-10
• ___ Brothers, duo who sang "Wake Up Little Susie" — 2018-04-04
• Pop's ___ Brothers — 2014-11-01
• ___ Brothers — 2011-06-02
• ___ Brothers — 2007-07-18
• Don or Phil of 50's-60's pop — 1997-10-28
• Singer Phil or Don — 1996-03-29