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.
In 1996, Lyngstad recorded her final album in Swedish, "Djupa andetag" ("Deep Breaths"), released by Anderson Records, before retiring from music.
In 1992, Lyngstad married Heinrich Ruzzo, Prince Reuss of Plauen, who was a prince of the former sovereign House of Reuss. Heinrich died of lymphoma in 1999.