Speaking exclusively with ET's Nichelle Turner backstage after Sunday's pageant, Nash opened up about what was going through the minds of the judges -- blogger Perez Hilton, former Miss USA Olivia Culpo and former NFL pro Emmitt Smith -- after Harvey accidentally named the wrong contestant as the winner.
During the grand finale, Harvey announced Miss Colombia as the new Miss Universe, when the title was actually meant for Miss Philippines. After a cringe-worthy moment, Harvey admitted that he had misread the card, and apologized.
In one of the most awkward moments in the history of live television, Miss Colombia, Ariadna Gutierrez, was de-crowned, and the regalia was bestowed upon a very shocked and confused Miss Philippines, Pia Wurtzbach.
Despite the embarrassing mix-up, Nash applauded Harvey for handling the situation responsibly and being upfront about his mistake.
"It was hard, because when all the girls came down at the end they didn't congratulate the real winner, which was Miss Philippines. Most of them went over to Miss Colombia because they knew her heart was breaking," Nash explained, adding that the mix-up and aftermath made Wurtzbach's win "bittersweet."
(Disclosure: ET correspondent Nischelle Turner also served as a judge for the preliminary rounds of the Miss Universe pageant, when the number of contestants was reduced from 80 to the final 15.)
The new Miss Universe also exclusively opened up to ET about winning the title, where she revealed that when she was named the real winner, she wasn't sure if it was another mistake and was afraid to take center stage.