Wearing a slinky white dress that showed off her tattoos, 'alternative' model Cami beamed for the cameras alongside former TOWIE star and reformed playboy Kirk.
The couple spent time with Cuban American Cami's family and her pals at the Miami do, and an onlooker said: "It was an emotional time for Cami because she was saying bye to all her friends and family. But she and Kirk had a ball that night and they couldn't keep their hands off each other!"
At one point, the loved-up duo enjoyed a steamy snog in the kissing booth and Kirk, 25, was later photographed enjoying a Cuban cigar.
Then two days after the party, Essex boy Kirk and fetish model Cami, real name Camila, 26, showed off their buff bodies as they relaxed by their hotel swimming pool.
Earlier, the broody model posted a photo of Kirk with her niece, writing: "Daddy in training."
The couple are now back in the UK, where they are busy making plans for their new life together at Kirk's plush Brentwood home.
Before flying back, Cami told her Twitter fans: "I've cried my goodbyes and am now on the plane. Let's do this!"
The pair, who began dating earlier this summer, have enjoyed a whirlwind romance. Weeks after meeting they had matching skull and crossbone tattoos inked during a Las Vegas holiday.
And last month, during a visit to the UK, Kirk proposed to Cami with a giant diamond ring after eating at their favourite Japanese restaurant, Wagamamas.
At the time, Kirk, who describes Cami as his "soulmate", tweeted: "She said yes!" And an ecstatic Cami wrote: "It's true! I love you, FOREVER. Stuck with me."
Kirk, who says he's slept with between 800 and one thousand women, insists he's now a changed man and the couple are set to tie the knot before the end of the year.
After getting engaged he tweeted: "Can't wait to get married this year, we will be together without this stupid time difference."
Check out all the pictures from Kirk and Cami's engagement party in the gallery below!
Read more about Kirk and Cami in this week's Reveal - on sale now!
Copyright: Pacific Coast News