Earlier this year, the Biebs made a cancer-stricken 6-year-old girl's Valentine's Day wish come true. After learning about Avalanna Routh's Facebook campaign to meet her idol on a WHDH Boston news report, the pop star retweeted her request and invited Avalanna, aka "Mrs. Justin Bieber," and her family to spend V-Day with him in Manhattan.
Sadly, on Sept. 26, Avalanna's parents announced via Twitter that their daughter, who was diagnosed with ATRT, an extremely rare form of brain cancer, had passed away. After hearing the terrible news about Avalanna's passing, the Biebs wrote on Twitter: "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. RIP Avalanna. i love you. please show respect to her and her family. say a prayer for her and for them. i miss her."