While this hand-draped leather yoke gown ($4,550) isn't exactly an impulse buy, but listen, if you regularly find yourself dressing for black-tie events (or just want to treat yourself), this is a no-brainer. Its skin-baring reveals never veer into the too-much-skin territory and the floor-skimming train injects a subtle amount of Old Hollywood glamour. Lest we forget, the sweetheart neckline and leather detailing provide the perfect juxtaposition of a sweet vs. tough sensibility. And, just like Jennifer did, you too could find yourself on the receiving end of some stunned reactions. What other kind of response could you illicit from this kind of head-turning gown?