The Canadian-born singer, 82, shared a photo of herself holding an American flag. Canada-born singer-songwriter, 82, posts footage of citizenship ceremony to InstagramJoni Mitchell has become a US citizen, after first moving to the country in the mid-1960s. Key points and original sources are listed below.

• The Canadian-born singer, 82, shared a photo of herself holding an American flag.S1

• Canada-born singer-songwriter, 82, posts footage of citizenship ceremony to InstagramJoni Mitchell has become a US citizen, after first moving to the country in the mid-1960s. The Canada-born singer-songwriter, 82, posted footage of her citizenship ceremony on...S2