Morones said she found Scamp on Petfinder, a pet adoption site, in 2014.
"It was on the way home that I knew I made the right choice," she said in a statement published on the event's website. "There we were, two strangers in a car on the way home to a new start. Bob Marley was playing 'One Love,' and I looked over and little Scamp was bobbing his head. It was like he knew he had found his forever home."
Wild Thang, a Pekingese from Los Angeles, took second place in the contest, while Tostito, a Chihuahua who lives in Maine, took third, the AP reported. Meatloaf, a bulldog mix from Sacramento, won the People's Choice Award.
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– The Associated Press contributed to this report.