6-year-old Avalanna Routh, aka "Mrs. Bieber," passed away.
The little girl struggled with a rare and incurable cancer called AT/RT and her battle and love of the Biebs was widely known among her Twitter followers.
Today her family posted, "Our darling Avalanna went to Heaven this morning. Oh Avalanna, the brightest star — you took our hearts with you, our greatest love.”
Back in February, the 6-year-old got to realize one of her dreams, she had a date with her adored idol. Following a "Get Avalanna to Meet Justin Bieber" campaign on Facebook and Twitter, the Canadian pop star flew her and her mother to New York for an early Valentine's Day date. The two played board games, ate cupcakes and candy, and Justin even let her style his famous hairdo.
After the meeting, he tweeted, "That was one of the best things I have ever done. She was AWESOME. Feeling really inspired right now.’’ Later, he added, "Best part of my day."