Excessive Heat Warning: Megan Fox's All-Time Sexiest Looks

When you've got it, flaunt it. Megan wowed in a strategically skin-baring Roberto Cavalli gown in 2009.

Megan highlighted her gorgeous gams with an up-to-there slit.

For the '09 Globes, Megan chose a gilded Ralph Lauren slip dress detailed with ornate beading.

Emerald drop earrings and a sleek updo completed her red carpet look.

A small train elevated the gown's simple silhouette.

Megan's sexy Hervé Leroux LBD was anything but boring.

The fitted sheath featured a mesh inset and dainty cap sleeves.

Megan once again proved nothing is safe from her sex appeal, including a classic LBD.

For the 2009 Transformers: Revenge of the Fallen LA premiere, Megan oozed Grecian goddess in an ethereal KaufmanFranco gown.

At first glance, one might think this look was a bit reserved for Megan, but upon further inspection . . .

You spot the gown's draped peekaboo bodice.

Megan sizzled at the Friends With Kids Toronto premiere in a fiery ruched Thakoon creation.

Dalmatian Brian Atwood Mary Janes lent a spot of sass to her sexy look.

She looked absolutely regal in a satin off-the-shoulder Donna Karan — complete with her signature leg-baring slit.

The gown's delicate draping highlighted her frame flawlessly.

Megan stepped out in a custom Armani Privé gown. The silky stunner was composed of an asymmetrical Swarovski-encrusted bustier, a thigh-high slit, and a cutout back.

We were treated to a peek at her dazzling Brian Atwood pumps as she floated down the red carpet.

The back featured a cascading chiffon train.

A more demure Megan showed her support for Giorgio Armani, donning a dove-gray one-shoulder sheath for the designer's Armani Privé show. She completed the look with black patent peep-toes and a coordinating enamel cuff.

A red lip and retro coils gave her party look a Parisian-chic spin.

The actress hit the blue carpet in an understated KaufmanFranco LBG in 2009.

The gown's slinky, strappy back injected a splash of sex appeal into her otherwise classic confection.

What can we say, the girl's bringing sexy back.

Megan downplayed her dark glamour with a soft pink Dolce & Gabbana lace strapless. Sideswept curls let her Lorraine Schwartz sparklers take center stage.

A lace-paneled train floated close behind.

The leading lady chose a silk charmeuse Armani Privé mini for her big night. Exaggerated shoulders, a plunging neckline, and a tulip skirt gave her frock a futuristic feel.

Bow-detailed Brian Atwood pumps provided a girlie spin to her red-hot look.