While embarking on the second leg of the Mrs. Carter Show World Tour in North America, Beyonce found herself partnering with the Make-A-Wish Foundation to help 12-year-old Taylon Davis' dying wish come true.Taylon Davis has cancer and suffers from an inoperable brain tumor. "Her dying wish was to dance with Beyonce," says Ivy McGregor of Philanthropy Program Partnerships. And thanks to the Make-A-Wish Foundation and Philanthropy Program Partnerships, she's getting the chance of a lifetime.

McGregor, Make-A-Wish rep Tracy Martindale, Davis' mother and other family members helped surprise the 12-year-old girl with a visit to Bey's tour stop in Las Vegas on Dec. 6.

"I found out I was coming to this concert a couple days ago, I believe," said Davis as she was being wheeled into a VIP section of the MGM Grand Garden Arena. As the tween anxiously waited for Queen B to hit the stage, she fell into tears as the 32-year-old superstar flew onstage and landed right in front of her seat.

After receiving an unforgettable hug, Beyonce danced with Davis while singing 'Survivor' -- she also helped her sing 'Love on Top.'

"There's a little girl literally fighting for her life," said McGregor. "Tomorrow's not promised, next week's not promised, but right now I'm here, and her thought that will forever stay with me is 'Since I'm here, I might as well live.'"

Get prepared for water works while watching the video above.

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