Billie Eilish's Brother Finneas Pens 20th Birthday Message To Her

Billie Eilish turned 20-years-old on December 18.

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Fans and celebrities wished Billie a happy birthday, on various social media platforms.

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Billie’s brother, Finneas also gave a birthday shout out.

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Finneas took to Instagram to explain how glad he is that Billie is his sister.

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Finneas added that he’s glad to have watched Billie grow and how hardworking she is.

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Finneas says he will be Billie’s number one fan until he dies.

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Finneas also had Billie’s back in the summer, when a false report of her was published by a fan account.

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Billie is also trending due to her own Nike Air Force 1 sneaker reportedly coming soon.

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Billie even had two of her own Air Jordan sneakers this fall.

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