|Dowager Countess of Plauen|
|Born||Anni-Frid Synni Lyngstad|
15 November 1945
Bjørkåsen, Ballangen, Norway
|House||Reuss (by marriage)|
|Also known as||Frida|
|Origin||Torshälla, Eskilstuna, Sweden|
Anni-Frid Synni, Dowager Princess Reuss of Plauen (German: Anni-Frid Synni, Prinzessin Reuß von Plauen; née Lyngstad, born 15 November 1945), commonly known as Frida Lyngstad (Norwegian: [ˈlyŋstɑ]; Swedish: [ˈlʏŋstɑːd]), or just by the mononym, Frida (Swedish: [²friːda]), is a Norwegian-born Swedish singer-songwriter, and environmentalist. She is best known as one of the lead singers of the Swedish pop band ABBA.