Phelps
Now that you put it THAT way, I definitely see your point. The so-called "crushes" my husband and I have had meant nothing because neither one of us take much stock in celebrities and never tried to hide anything from each other.
If it were me, I'd find a good time when the two of you were alone and ask outright what's the deal with her obsession with that man. The lengths she goes to doesn't sound natural, so something must be going on in her head.
Hopefully, that good relationship you've had all these years will help your cause. It may be embarrassing for her, but maybe she'll have a little compassion when she sees how it makes you feel. Her secretive behavior is similar to someone who IS having an affair, even if it's just an "image." It might even feel worse to play "second fiddle" to an image - hard to compete with an airbrushed entertainer.
Good luck