The greatest fashion lesson to be learned from the lovely Lauren Conrad is this: find a formula that works and run with it. The reality star/fashion designer has been known to mix it up on occasion by experimenting with different looks, but overall, Lauren's style is polished, chic, and structured, with an underlying no-muss no-fuss effortless feel. At the Do Something pre-party for the Teen Choice Awards, Lauren stuck to her winning formula and looked as perfectly put together as always in a Mason strapless sheath dress topped off with a skinny belt, Christian Louboutin pumps and some delicate accessories, including a necklace she designed for the MARK Cosmetics m.powerment campaign. Check out my SLIDESHOW to get this perfectly polished look!