X-Men 3 used some pretty amazing digital trickery to portray Ian McKellen and Patrick Stewart as younger versions of themselves. Now you can see side-by-side comparisons of just how drastic the transformations were, turning Stewart into a smooth plastic doll, and McKellen into Timothy Dalton's gayer brother. Someone should tell Cher* about this. She could have saved herself a few replacement faces. Because she's had so much plastic surgery!
*Alternatively, Joan Rivers.
See youthful Magneto under the cut.