BOSTON -- A 6-year-old Massachusetts girl whose love for Justin Bieber encouraged physicians and nurses at a Boston hospital to organize a pretend wedding to the pop star as she battled a rare brain cancer has died.

The family of Avalanna Routh -- who called herself Mrs. Bieber -- tweeted that she died yesterday at her home in Merrimac. "Oh Avalanna, the brightest star -- you took our hearts with you, our greatest Love," the family wrote.

Avalanna's pretend wedding sparked a social media campaign to help her meet the singer. Bieber later arranged for the girl to meet him in New York, where they spent a couple of hours together.

"just got the worst news ever. one of the greatest spirits i have ever known is gone," Bieber tweeted Wednesday. "please pray for her family and for her." "RIP Avalanna. i love you," he said.

Avalanna suffered from an atypical teratoid rhabdoid tumor, a fast-growing tumor of the brain and spinal cord that usually occurs in young children. There was no immediate word on funeral arrangements.

-- AP

Get the latest news and more great videos at NewsdayTV Credit: Newsday

One-on-one with Gilgo DA ... What's up on LI ... Plays of the Week ... Get the latest news and more great videos at NewsdayTV

Get the latest news and more great videos at NewsdayTV Credit: Newsday

One-on-one with Gilgo DA ... What's up on LI ... Plays of the Week ... Get the latest news and more great videos at NewsdayTV

SUBSCRIBE

Unlimited Digital AccessOnly 25¢for 6 months

ACT NOWSALE ENDS SOON | CANCEL ANYTIME