BOSTON (WHDH) — Avalanna Routh, known as 'Mrs. Bieber' passed away Wednesday morning according to a tweet from her official Twitter account.
"Our darling Avalanna went to Heaven this morning. Oh Avalanna, the brightest star – you took our hearts with you, our greatest Love."
Avalanna had AT/RT, atypical teratoid rhabdoid tumor, a rare and deadly tumor diagnosed in childhood. Avalanna was 6-years-old.
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