leading in trends. entrepreneurs have to do that. you can't say i have one market and it's going to pass by. >> because of technology, you have to pay attention to the world and how your customers are changing. moving on, natalie portman. >> be a grand ambassador. natalie portman was a vegan for some time. they developed a line of vegan shoes. she couldn't find red carpet styles that didn't use leather. they teamed up to display her passion through this brand of shoes. >> as a business, find a cause you care about or your own cause? >> your own cause for your business. christy, a supermodel is a passional yogi. he wanted to funnel that into a clothing line, a book, the