A young woman who had a serious eating disorder but reformed her life through yoga and is now helping others, received a series of four life-changing "tips" during her shift as a waitress.

A YouTube partnership decided to "Prank it Forward" and give the Los Angeles worker the "best shift ever".

First they arranged for someone to tip Chelsea Roff a thousand dollars. Next someone gave her free vouchers for a trip for two to Hawaii.

Believe it or not, the surpises grew even bigger than that.

And, finally, a special surprise guest was flown in to present her with a new car.

All the employees of the Spring Street Smoke House and her boss were privy to the plan and helped make it run smoothly. Cameras planted in the ceiling recorded all the fun. And everyone joined in for hugs and laughter when it was over.

WATCH the inspiring generosity unfold from "Break" on YouTube