In 2003 Demski won the Miss Arizona USA 2004 pageant in her first attempt at the title, becoming the third Miss Arizona Teen USA to win the Miss Arizona USA title. She represented Arizona in the Miss USA 2004 pageant broadcast live from the Kodak Theatre in Hollywood, California, on April 11, 2004, and again made the first cut, the first Arizonan to do so since 1998. She competed in the evening gown competition, but did not advance to the top ten. Demski is one of only seventeen women who have placed in both the Miss Teen USA and Miss USA pageants.
