Sexy Stars: Emily Ratajkowski, Alessandra Ambrosio and more stun in sultry styles

Red-hot!

Emily Ratajkowski has no qualms about showing off her body -- and she did just that when she slipped into a barely-there backless, ultra-short minidress that exposed her bare back and a touch of sideboob. The front of her dress dipped low to expose her ample cleavage. Silver floral embroidery and a dramatic, floor-length scarf detail added a romantic touch.

Rita Ora also rocked the sexy hue this week in a crimson turtleneck catsuit that hugged her curves. A messy bun, hoop earrings and simple sandals completed her head-turning look.

Model Alessandra Ambrosio ditched the hot color -- but still looked sexier than ever -- in a black striped two-piece ensemble with culotte pants and a spaghetti strap crop top that flashed her washboard abs. Sky-high leather sandals and a pendant necklace completed her hot look.

See these looks and more in the slideshow above.

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