Marion Cotillard's got the perfect mix of classy and sexy at the London premiere of "Public Enemies", where she steps out in a red satin Vivienne Westwood creation with an oversized Stella McCartney clutch in hand.

Style tip: A scarlet number screams look-at-me sexy. Complete the look with statement black accessories like an oversized purse or sky-high ankle-strapped heels to up the luxe factor.

Alicia Keys brings ethnic chic to the BET Awards in a studded Jenny Packham mini frock and bohemian sandals.

Style tip: A hip-length tunic like Alicia Keys' doubles as a sexy mini dress. Wear it on its own or with leggings for two different looks.

Working the minimalist look at the BET Awards in L.A., Zoe Saldana turns heads in this white Calvin Klein with a sexy cut-out and daring thigh-high slit.

Style tip: Minimalist doesn't have to mean boring. If you're going for a simple monotone, add interest to your silhouette with asymmetrical hems or edgy cut-outs.