Jennifer Hudson‘s road to success has been filled with incredible ups and downs and she shares her story with fans in her new autobiographical book, ”I Got This : How I Changed My Ways, Found Myself, and Lost What Weighed Me Down.” Hudson went from being an American Idol contestant to an Oscar winner for her work in the movie Dreamgirls — but also experienced tremendous tragedy in 2008 when three members of her family were murdered by her brother-in-law. In 2010, Jennifer has lost 80 pounds on the Weight Watcher’s plan and says her two year-old son David has never seen her overweight. She told Good Housekeeping: “If he sees a clip of the old Jennifer from Dreamgirls, he doesn’t know who it is.” Hudson says the secret to her successful weight loss is eating more healthy and working out at a gym four times a week. “There would be times I would be sitting on the couch, like, Man, I really don’t feel like working out,” she admits with a laugh. “So I’d force myself to just get up and run — literally run — out the door. Because if you sit there and think about it, you’re going to talk yourself out of it.” She made an appearance yesterday at a Barnes and Noble store at Old Orchard Mall in Skokie, Illinois to sign copies of her new book, with her boyfriend David Otunga and their son onhand to support her.