Josh,

Many women have serious doubts about their looks. Even famous models have confessed to being unhappy with their bodies.
If you're gonna hang pictures of a gorgeous woman in the house you will not boost your wife's self confidence. She will be unhappy about it no matter how often you tell her you think she is beautiful. Even if she will eventually allow you to hang the pics in the house she will always be unhappy about it and suspect you have a serious infatuation for Julia Roberts.

My advice would be: drop the whole thing and concentrate on things that will improve your relationship. Keep the pics in a drawer, take an occasional quick look at them when you're alone with them and dream for a while.

IMHO such pictures are more suitable for garages, students' dorms and photographers' studios. Grow up Josh! You're a married man now, don't push your luck!