The 30-year-old model, who has served twice as a backstage host for Miss Universe, recently expressed her disappointment in not seeing any curvy contestants compete in the worldwide beauty pageant.
American comic turned TV host Steve Harvey hosted the event for the third time, making several jokes at his own expense.
The pageant victor started the program after she was robbed at gunpoint shortly after she was crowned as Miss South Africa. "Because not yet have we had a curvy girl in Miss Universe or even in the Miss USA pageant".
Jamaican beauty Davina Bennett was the second runner-up, while Colombian beauty Laura Gonzalez was the first runner-up.
But she failed to make it to top five where candidates were asked a question to determine the top three.
Did you watch this year's Miss Universe pageant? "Miss Universe is one who has overcome many fears and will inspire other women too, to overcome their fears".
She adds, "A truly magical evening, welcome to the family Demi!" Nel-Peters slew the final question and answer portion who promoted the confidence and overcoming of fears especially for women.
While a majority of South Africans were showering Nel-Peters with praises and congratulating her after her win, some, including highly opinionated South African poet Ntsiki Mazwai, think Miss Jamaica should have won. The 22-year-old recently earned a business management degree at North-West University, and during the show's Q&A, when asked what she thought was the most important issue facing women in the workplace, she took the opportunity to speak in favor of closing the gender pay gap.
Wait, I might change my vote to Miss Canada.
"The Universe is now brighter with you as a shining star".
Seated on the judges tables were Miss Universe 2015 Pia Wurtzbach, Hollywood Today host Ross Mathews, fashion correspondent Jay Manuel, top internet influencer Lele Pons, UFC backstage reporter Megan Olivi, hair care/spa products company founder Farouk Shami, and Miss Universe 1998 Wendy Fitzwilliam.