Stewart graduated from the University of Houston in 2007. She won the Miss Texas USA 2008 title in a state pageant held in Laredo, Texas on July 1, 2007. She competed against 121 other contestants. She is the second African American to win the crown at Miss Texas USA. Chelsi Smith was crowned Miss Texas USA 1995. Smith later became Miss USA and Miss Universe.
Stewart became the ninth Texan to win the Miss USA title.
Stewart hosted the Miss Teen USA 2009 competition on July 31, 2009 with Seth Goldman. Goldman and Stewart again hosted the Miss Teen USA pageant on July 24, 2010. Stewart hosted the 2011 Miss Texas USA contest with Jason Feinberg.
- "Texan Takes Miss USA Crown in Las Vegas". Washington Post. 2008-04-12. http://www.washingtonpost.com/wp-dyn/content/article/2008/04/12/AR2008041200018.html. Retrieved 2008-05-10.
- Associated Press (2007-07-01). "Miss Fort Bend County takes Miss Texas title". Houston Chronicle.
- "Miss Fort Bend County wins Miss Texas USA". Houston Chronicle. 2007-07-02.
- Ignacio Salazar (2008-04-14). "UH's Crystle Stewart wins Miss USA". houstonist.com. http://houstonist.com/2008/04/14/uhs_crystle_sew.php. Retrieved 2008-05-10.
- Miss Central Laredo USA, Ana Rodriguez Wins the MISS TEXAS USA Crown