I think she has some of those clip on choppers like the little girls use in the beauty pageants when they have lost their front teeth.
Either that or she borrowed Mr. Ed’s teeth.
She does look younger on the right, but objectively, I don’t see a killer discrepancy. I can even match the horizontal cleft on her right side to a much more subdued but still present, cleft in the “younger” open-mouthed rigth side image.