Swedish songstress Anni-Frid Lyngstad (full name Princess Anni-Frid, Dowager Countess of Plauen) was in her 20s when she became an international sensation after she and her 3 harmonically-superior bandmates formed the iconic ’70s band ABBA … and released hits like ‘Gimme! Gimme! Gimme!,’ “The Winner Takes It All,” “Mamma Mia,” “Take A Chance On Me” … and course the disco juggernaut “Dancing Queen.”

Lyngstad was joined in the supergroup by the keys-tickling (and her husband at the time) Benny Andersson … and blonde vocalist Agnetha Faltskog and her partner the guitar-strumming Björn Ulvaeus.