Out of the many young trendy stars in Hollywood, Nicole Richie and Rachel Bilson's style are the ones that I like the most. Even though they are both very young, Richie, 28, and Bilson,  27 always seem to look girly and classy in whatever attire they wear.

Richie, The Simple Life star, has come a long way from her days as the wild girl with unruly extensions and trucker hats. Now, Richie, the mother of Harlow, age one, has undergone a beautiful fashion transformation. Instead of that rough look she used to have, she now has the air of a classy vintage mama. She seems to balance her looks with the dark accents of a New Yorker and the soft bright colors of a beachy L.A. girl. Richie's fashion staples are skinny jeans with a loose-fitting top and heels.

Even while pregnant, Richie managed to still be the fashionista, not even seeming to appear pregnant with her cute little conservative dresses that she wore. At a Zac Posen fashion show on Feb. 19, she sported an elegant ruffly dress that hid her pregnancy quite well.

Despite her short stature, Richie somehow manages to wear long boho maxi dresses without the dress overwhelming her small frame. Her skinny jeans are so well tailored to her frame that most of her pants seem to look like they are tights. Her style never seems to go wrong with her big oversized glasses.

Rachel Bilson, former OC star, has a style that differs from Richie's. She always looks flawless when wearing a Zac Posen gown or even when she's just walking around on a typical L.A. day with just a t-shirt and some jeans. Bilson usually opts for a trendy look with neutral colors, but she isn't afraid to spice things up with a bold accessory that brightens up her whole outfit like vintage fedoras and handbags, Simple but casual must be the words that this fashionista lives by.

I cannot recall there ever being a time where I did not like Bilson's outfits. I applaud her for always looking so effortlessly put together. Always at the end, she gives a delicate touch to her outfits without seeming too revealing.

To get Bilson's look, shop at her favorite stores like flea markets, thrift shops, and Target. To get Richie's look, visit WhoWhatWearDaily.com to get runway looks that Richie draws inspiration from for cheap. She reportedly says that she spends hours on this website, so if you like her style you are bound to find something of your liking.