The model stars opposite Leigh Francis in upcoming film spinoff Keith Lemon: The Film.
Speaking on the ITV Loose Women panel about a moment from the movie involving a piece of asparagus, Brook said: "I did a lot of research for that scene.
"Tulisa's tape came in quite handy. I've watched that a few times!"
She added of the film's script: "I loved it. It was the most outrageous script I think I've ever read.
"It is so offensive, so outrageous people are going to want to see it."
Keith Lemon: The Film is released this August.
Amanda Holden previously revealed that she and her Britain's Got Talent colleague Alesha Dixon had both seen Contostavlos's sex tape.
"It's a terrible thing to confess, but everyone wants to see it," she said.
Contostavlos has said that the video in question "doesn't really class as a sex tape".