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Justin Bieber today responded to the death of 6-year-old Avalanna Routh -- a girl he called Mrs. Bieber.
"just got the worst news ever. one of the greatest spirits i have ever known is gone. please pray for her family and for her," Bieber tweeted. "RIP Avalanna. i love you"
Bieber met the 6-year-old cancer patient in February. At 9 months old, Routh was diagnosed with a rare brain cancer called AT/RT and has undergone many surgeries over the course of her life.
Currently, on Twitter, "RIP Alanna" is trending topic.



