There's nothing like a perfectly fitted, black, off-the-shoulder gown to make us swoon. Pair it with a striking, multi-colored Bvlgari bib necklace, and we're downright weak in the knees. It's the perfect red-carpet combo.

At the Venice Film Festival, Scarlett Johansson's Versace dress fit like she was poured into it, but we couldn't take our eyes off of the bling. Those purple, blue and green diamonds popped on ScarJo -- proof that a single accessory can turn a classic look on its head.