Today Show: Justin Bieber gives 6-year-old cancer fighter Avalanna Routh an amazing Valentine's Day

NEW YORK, N.Y. -- A little girl battling a rare form of brain cancer is having one happy Valentine's Day thanks to Justin Bieber.

Avalanna Routh is just six-years-old, but she's beating the odds of an aggressive, deadly cancer that she's had since she was a baby.  

She's also proving that dreams really do come true, as you can see by these pictures.

Bieber flew the little girl and her family to New York Monday, where you can see she was all smiles.

Bieber later said it was one of the best experiences of his life and that little Avalanna was "awesome."

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