The model left to huge cheers from the crowd as she wore a trademark pink dress to great host Brian Dowling.
In her interview, Alex said: "To be here for the final is mad, to come third... third! I've been a fan of the show since I was 14, I've always said I want to do it. I've always said anything you want out of life just push for your dreams and you'll always achieve it."
On her relationship with Tom, Alex said: "I didn't think in a million years I'd come in and have that kind of best friendship come out of it. He's just amazing.
"It wasn't a romantic relationship thing, just full on best friends. It really wasn't, it was just a whole lot of fun."