Princess Diana Taught Us 7 Style Lessons We'll Never, Ever Forget

The next time you don't know what to wear, just take a style cue from Princess Diana's easy, four-part ensemble. For a stroll at the Guards Polo Club in 1988, she dressed down in a white British Lung Foundation logo sweatshirt, jeans, boots, and a baseball cap. Diana gave the outfit a more polished feel with structured outerwear. It appears denim is the one piece even royals can't live without, proving everyone needs a few pairs.