Historical clue formulations

• Genre for Abba and Ace of Base — 2025-04-13
• Ace of Base genre — 2019-06-07
• Abba's music — 2014-09-12
• Abba's genre — 2013-07-26
• Abba's music genre — 2012-04-18
• Some breezy Top 40 songs — 2009-10-23
• Abba's style — 2008-03-14
• Music of Abba or Roxette — 2002-10-13