Anni-Frid Lyngstad
Anni-Frid Synni, Dowager Princess Reuss of Plauen (; née Lyngstad, born 15 November 1945), commonly known as Frida Lyngstad (; ), or just by the mononym, Frida (), 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.