Lily, a 19-year-old waitress, had no idea that she was serving NASCAR legend Dale Earnhardt Jr.. Polite and discreet, Dale Earnhardt Jr. enjoyed his meal without drawing attention to himself. But as he left, he left a receipt for the waitress… and walked away with a smile. Lily opened it out of curiosity, but immediately began to cry. What Dale Earnhardt Jr. wrote was more than just a thank you: It changed her life…