On September 28, 2004, Kristin Cavallari appeared in the premiere episode of MTV’s Laguna Beach (“A Black & White Affair”). So began her transition from “popular high school student” into “person who gets paid to promote things.” What was the first dumb product our nascent reality TV star promoted?

An exhaustive search through multiple photo archives indicates that Kristin probably hawked her first product on August 28, 2005, at a “Style Villa” pre-party for the MTV Video Music Awards. Here she is holding up an extra-large Vitamin Water with her ex-boyfriend and co-star Stephen Colletti. (It appears Stephen is also promoting something on his t-shirt, but I could not tell you what.)

Today, Kristin hawks all sorts of products online: Hoover® vacuums, Secret Bangs™, Wonderful Halos...the list (truly) goes on. But everyone starts somewhere, and now you know that Kristin started with Vitamin Water.

This has been 500 Days of Kristin.

[Photos via Getty]