Sexy Dresses Under $100

Talk about white hot! Use one of summer's It colors to amp up your tan—just ask Cameron Diaz.

Polyester dress, Miss Selfridge, $74; missselfridge.com.

Hello, color! Amp up your wardrobe with a bright, strapless mini. Take a tip from Blake Lively: don't compete with the vivid pattern—opt for classic stilettos and a sleek ponytail instead.

Cotton poplin dress, Delia's, $40; delias.com.

The already seductive LBD gets an extra jolt of va-va-va-voom from a modern, curve-enhancing silhouette. Cap sleeves make this design more seasonal than Zoe Saldana's version, but the deep V is year-round sexy.

Cotton dress, AllSaints Spitalfields, $95; allsaints.com.

Nothing sizzles like this eye-catching hue. Style trick: cinch your design with a skinny belt a la Malin Akerman-head-to-toe scarlet's hotter when you can see your curves!

Laser-cut dress, H&M, $40; hm.com for stores.

You don't need to show a lot of skin to turn heads. A form-fitting dress in Scarlett Johansson's sunny yellow hue is all-day sexy. Top it off with a cardigan and flats for an afternoon get-together then toss that outer layer and add heels for a night on the town.

Polyester shift, ASOS, $83; asos.com.

Play peek-a-boo with your summer wardrobe like Kate Bosworth. Call attention to the alluring sweetheart neckline with bright accents like oversized gems or a colorful bra (if you dare!).

Polyester dress, Topshop, $90; topshop.com.

Steal Taylor Swift's sparkle in an eye-catching tank dress. Work the modern metallic head-to-toe or paired with chic neutrals.

Sequin tank dress, Obey, $60; farfetch.com.

Add some sugar to your spice with a pastel confection. Want to pump up the volume? Accessorize this sweet trend with with colorful heels like Diane Kruger's teal peep-toes.

Viscose dress, Cutie, $43; dorothyperkins.com.