As for how the magical moment came to be, Perez tells ET exclusively that Smits had reached out to Lopez weeks earlier to plan which show would make the best proposal, which left her completely "shocked and surprised.
"I was beyond shocked and surprised! I had no idea Lake was even in Vegas, or at the show at all," she shared. "He was hiding in the back of the theater watching the entire show alongside my parents, his mom and sister."
Having Lopez be a part of their engagement was only fitting for the couple, as Perez said dancing together on the singer's Dance Again World Tour in 2012 "played a huge role in our relationship."
"I have been dancing for Jennifer for about eight years now, and Lake danced for her for 3 years," she explained, noting that they'd love to have Lopez involved in their upcoming wedding.
"We are hoping to plan a wedding sometime next year, in 2018, but with the engagement being so new, we are definitely happy enjoying this moment in love and taking it in!" she gushed. "As far as [Lopez] performing at our wedding, we would never expect that. She is family to us and we love her, and all that would matter is that she's just there sharing our special day."