Pati met Edris, a soprano, on a week-long singing course in Christchurch in 2011.
"It was funny - her roommate was dating my roommate and we were the two spare wheels that would find each other outside reading a book," Pati recalled to the Herald last month.
"She loved me before Sol3 Mio's success so I know she loves me for who I am. I'm a very lucky man."
Pati said he was "smitten" with Edris right away - but he wasn't sure it was requited. "Fortunately, I was wrong about that."
The pair started dating a week after the course, but had to endure long gaps apart as their romance blossomed. Pati trained as a tenor in Wales while Egypt-born Edris continued her opera training in California.
Pati recalled the moment he proposed in an interview with the Herald a week later.
"The proposal was a big surprise for Amina and when the moment came to do it, I took a big gulp and knew there was no going back," he said. "I had no plan B if she said no in front of thousands of people but I was quietly confident it would all go well."
The couple plan to have children together after their weddings.