Sometimes all you need is one showstopping strand of bling to make a serious siren statement — and last night's Oscar A-list set offered up multiple ways to execute it with minimal fanfare. Three words: single-strand necklaces. Michelle Williams chose a sweet diamond necklace to accent her coral Louis Vuitton gown on the red carpet, while Olivia Wilde opted for a bold collar to offset her slinky Gucci number at the Vanity Fair party. Zoe Saldana gave the illusion of a floating diamond collar with her strategically embellished Marios Schwab frock, Penelope Cruz added a stunning strand to highlight the princess quality of her Armani confection, and Natalie Portman chose a gorgeous diamond V-shaped choker to accompany her vintage Christian Dior look. It's a simple accessory trick with infinite glitz potential. To achieve a similar decked-out décolletage, shop our Oscar-worthy single-strand picks at all price points below.