LOS ANGELES, Oct. 15 -- When the speaker read out "And Joni Mitchell, Canada," the room cheered. Mitchell, 82, sat in the front row in a red beret and an American flag pin, and left the ceremony a citizen of the country she has lived in since 1965.

She announced it Tuesday on Instagram with a photo of herself holding a flag and a clip from the ceremony. "A journey that began 62 years ago," the caption read. Neither the clip nor the coverage that followed says where the ceremony took place.

What makes it more than a milestone is what she has said about the country while a foreigner in it. At the 2024 Hollywood Bowl she made an expletive-laced remark about Donald Trump, NBC News reported, and urged the crowd to vote, saying she wished she...