Don't worry about those boys with cameras. They are at least 20 years old in nowadays, and they must have got their own girlfriends instead of thinking about Julia's front all the day.
In my opinion they've got Julia's scenes shot in the film studio,maybe in front of the blue screen. Then, they could have easily combine the boy scouts and the naked Julia.
The same method has been used in the Terminator 3, in the scene which T-X emerged naked on the street.
wow, what happened to the trivia section?! Its quite empty suddenly...
Don't be silly, they wouldn't have gone blue screen to shoot that, that would be costly & pointless
Just like this movie.
Nothing exists more beautifully than nothing.