Anni-Frid Lyngstad is Swedish and French.
Anni-Frid Synni , Princess Reuss of Plauen ( Anni-Frid Synni , Prinzessin Reuss von Plauen born Anni-Frid Synni Lyngstad , [ ² ɑnːɪˌfriːd ˈlʏŋstɑ ] ; [ ² anːɪˌfriːd ˈlʏŋstɑːd ] , 15 November 1945 ) , widely known as Frida Lyngstad or by just the mononym Frida ( [ ² friːdɑ ] ; [ ² friːda ] ) , is a Swedish pop and jazz singer .