Who Is Billie Eilish’s Brother Finneas O’Connell? 25 Facts You Didn’t Know About the Grammy Winning Producer

Green Day Was His First Concert

Instagram / Finneas

He saw Green Day at the Forum in Los Angeles when he was around 11 years old. He claims it “profoundly changed his life.” He also told BuzzFeed that Billie Joe Armstrong mooned the audience and that blew his mind and hopes that one day he could be successful enough to do that.

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