The pair, widely considered the team to beat, defeated Nathan Glover and Erin Barnett in the final elimination quiz.
“I never expected to meet so many amazing people and have so much fun,” said Brett.
“Underneath all their geekiness were a great bunch of people who I will be friends with for life,” said Emily. “Brett was the best partner. We got along from the moment we met. Zac would lend me books and Matthew taught me the letters of the periodic table.”
Season five of the reality series, filmed in Fiji, pulled up to 1.6m viewers for its popular makeover episode.