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Lauren slipped into an LBD with a statement-making bow at the second season premiere of The Hills in 2007.

She picked an unusually colorful number for a 2007 Us Weekly event. Loving the green beadwork.

Wearing Alexander Wang—then a still relatively-unknown young designer—at The Hills' Season 3 premiere.

The reality star showed off her budding design chops at the 2007 Teen Choice Awards in a teal bubble dress from her eponymous fashion line.

Lauren picked a party dress with a little extra volume for the 2008 MTV VMAs.

The Mark spokesgirl hit a 2008 Avon event in this boldly patterned mini.

Wearing a sparkling dress from 3.1 Phillip Lim, Lauren attended the Season 4 finale of The Hills alongside co-stars Audrina Patridge and Whitney Port.

She picked a pair of wide-legged pants, a studded belt and her trusty Chanel flap bag for an appearance on the Late Show With David Letterman in 2008.

In super-ruffled Moschino at the 2009 MTV Movie Awards.

Lauren wore this sweet lace LWD to sign copies of not one, but two of her books: Sugar and Spice and Lauren Conrad Style Guide.

When Lauren picks a printed look, it's generally still subtle. Such was the case with this Diane von Furstenberg dress she wore to the 2009 VMAs.

The star showed up at the 2009 VH1 Divas event in a sequined dress that complemented her pal Whitney Port's. Hello, photo op.

We love when Lauren wears high street labels, like this powder-blue Topshop gown she chose for VH1's Save the Music Foundation Gala in 2010. Way to be budget-conscious, L.C.!

In a sparkling, statement-making gold dress at her 25th birthday party in Las Vegas.

Lauren dressed up her shorts with Veronica Lake-worthy waves at Teen Vogue's Young Hollywood Party in 2010.

Showing off three Lauren Conrad style signatures—a high-waisted miniskirt, sleek topknot and quilted Chanel bag—at an Us Weekly party in 2011.

Last April, she test-drove pink-dipped hair while signing copies of her novel The Fame Game in L.A.

Keeping it cool in a boater hat and colorful bandage skirt with Lea Michele at Coachella.

Continuing along the promotional trail for The Fame Game, Lauren wore a printed maxidress from her own Paper Crown collection.

Clearly, the girl loves herself a floor-sweeping hemline. This silk tank-and-skirt combo she wore to a David Yurman store opening was peachy perfection.