Avril Lavigne is turning her biggest hit into a film! The 37-year-old rocker spoke with ET’s Kevin Frazier and Nischelle Turner during the 64th annual GRAMMY Awards on Sunday, and shared where she is at with her «Sk8er Boi» film.“Well, I don’t have my cast yet, but I've been working on it already for two years,” the singer said about the project. “Songwriting, making an album takes like six months or a year.