Video of a surprise for a 10-year-old Texas girl goes viral.

FOX's Lillian Woo reports:

Emma Bennett, who has a prosthetic leg because of birth defect, always wanted a doll that looked like her, but she never had one till now:

(Bennett) "You've got to be kidding me."

Bursting into tears at the gift... Thanks to her mom and the people at A Step Ahead Prosthetics, they work mainly with humans, but when Courtney Bennett sent them an American Girl doll, they were able to fit her with a tiny prosthetic. Her mom Emma asking:

(Bennett) "Do you love her... I love you..."

The New York company says it provides the service free to little girls with limb loss.

Lillian Woo, FOX News.

Follow FOX's Lillian Woo on Twitter: @LILIANNY