Justin Bieber is mourning the loss of his biggest and cutest fan today.
Avalanna Routh, referred to by many who knew her as "Mrs. Bieber," succumbed this afternoon to a long battle with cancer. She was six years old.
In February, due to a persistent Facebook campaign, a visit was arranged between Routh and Bieber in New York City.
The two spent hours there playing Candyland and exchanging playful kisses and hugs.