PHOTOS: Miss District of Columbia Wins Miss USA Contest for Second Year in a Row

The District of Columbia has won back-to-back Miss USA titles! Kara McCullough, a 25-year-old chemist working for the U.S. Nuclear Regulatory Commission, was crowned Sunday during the event that took place at the Mandalay Bay Convention Center on the Las Vegas Strip. She will go on to compete on the Miss Universe contest.

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AP (top L); others Getty Images
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Singer/songwriter Brett Eldredge (C) performs as the top 10 finalists (L-R), Miss Alaska USA 2017 Alyssa London, Miss Illinois USA 2017 Whitney Wandland, Miss New York USA 2017 Hannah Lopa, Miss South Carolina USA 2017 Megan Gordon, Miss District of Columbia USA 2017 Kara McCullough, Miss California USA 2017 India Williams, Miss Tennessee USA 2017 Miss Allee-Sutton Hethcoat, Miss Missouri USA 2017 Bayleigh Dayton, Miss New Jersey USA 2017 Chhavi Verg and Miss Minnesota USA 2017 Meridith Gould compete in the evening gown competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss South Carolina USA 2017 Megan Gordon (L) and Miss New Jersey USA 2017 Chhavi Verg (R) look on as Miss District of Columbia USA 2017 Kara McCullough (C) is named one of the top three finalists during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. McCullough went on to be named the new Miss USA and Verg was named the first runner-up. (Photo by Ethan Miller/Getty Images)
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Miss District of Columbia USA 2017 Kara McCullough competes in the swimsuit competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. She went on to be named the new Miss USA. (Photo by Ethan Miller/Getty Images)
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Miss District of Columbia USA 2017 Kara McCullough reacts after being named one of the top five finalists during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. She went on to be named the new Miss USA. (Photo by Ethan Miller/Getty Images)
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Co-host Julianne Hough (L) introduces Miss USA 2016 Deshauna Barber -- who won the 2016 pageant as Miss District of Columbia -- during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Co-host Julianne Hough (L) looks on as Miss District of Columbia USA 2017 Kara McCullough answers a question during the interview portion of the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. McCullough went on to be named the new Miss USA. (Photo by Ethan Miller/Getty Images)
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Cast members from "Michael Jackson ONE by Cirque du Soleil" perform during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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AP
Miss District of Columbia, USA, Kara McCullough reacts after she was crowned the new Miss USA during the Miss USA contest, May 14, 2017, in Las Vegas.
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Contestants stand on stage with cast members from "Michael Jackson ONE by Cirque du Soleil" during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss New Jersey USA 2017 Chhavi Verg reacts after being named a top 10 finalist during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. She went on to be named first runner-up. (Photo by Ethan Miller/Getty Images)
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Miss Minnesota USA 2017 Meridith Gould smiles after being named a top 10 finalist during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. She went on to be named the second runner-up. (Photo by Ethan Miller/Getty Images)
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Miss California USA 2017 India Williams (L) and Miss Tennessee USA 2017 Miss Allee-Sutton Hethcoat embrace after they were named top 10 finalists during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss Minnesota USA 2017 Meridith Gould competes in the swimsuit competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. She went on to be named the second runner-up. (Photo by Ethan Miller/Getty Images)
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Miss California USA 2017 India Williams competes in the swimsuit competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss South Carolina USA 2017 Megan Gordon competes in the swimsuit competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss Alaska USA 2017 Alyssa London competes in the swimsuit competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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(L-R) Miss California USA 2017 India Williams, Miss Tennessee USA 2017 Miss Allee-Sutton Hethcoat and Miss Missouri USA 2017 Bayleigh Dayton compete in the swimsuit competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss South Carolina USA 2017 Megan Gordon competes in the evening gown competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss New York USA 2017 Hannah Lopa competes in the evening gown competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss Alaska USA 2017 Alyssa London competes in the evening gown competition during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss Minnesota USA 2017 Meridith Gould reacts after being named one of the top five finalists during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. She went on to be named the second runner-up. (Photo by Ethan Miller/Getty Images)
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Miss Illinois USA 2017 Whitney Wandland reacts after being named one of the top five finalists during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Miss South Carolina USA 2017 Megan Gordon reacts after being named one of the top five finalists during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Co-host Julianne Hough (L) looks on as Miss Minnesota USA 2017 Meridith Gould answers a question during the interview portion of the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. Gould went on to be named the second runner-up. (Photo by Ethan Miller/Getty Images)
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Co-hosts Terrence J (L) and Julianne Hough stand together during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Rapper Pitbull (C) performs with dancers during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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Rapper Pitbull (C) performs with dancers during the 2017 Miss USA pageant at the Mandalay Bay Events Center on May 14, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
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