If you have a wedding or cocktail party coming up this Spring, look to Rachel McAdams's chic look at the premiere of The Vow for inspiration. The actress zeroed in on the pretty-cum-sexy vibe, opting for a curve-conscious Vivienne Westwood dress, but in a soft pastel hue. There's also a cool contrast to her evening style — Rachel toughened up her cocktail frock with Pomellato diamond and gold chain statement jewels, then finished on a softer note with a pair of nude Louboutin pumps and a delicate lace-trimmed clutch in hand. Love the look? Shop our key pieces to channel the same sweet-meets-sultry style — complete with the perfect red lip.