Cut-out dresses have become the go-to trend for celebs who want to flaunt their uber-toned obliques on the red carpet.

"The slits add a sexy update to a simple dress and can especially flatter a slim waistline," says Penny Lovell, who styles Ginnifer Goodwin, tells Us Weekly.

But recently the look has evolved from subtle slashes that show a hint of skin (think Kerry Washington, Emma Roberts and Ginnifer Goodwin at this year's Met Gala) to extreme cut-outs.

Selena Gomez, 18, who typically wears sweet and flirty dresses, sizzled at the Billboard Music Awards in a Dolce & Gabbana gown, which not only featured cut-outs around her waistline, but also a thigh-slit in the front.

PHOTOS: Billboard Music Awards 2011: What all the stars wore

Supermodel Miranda Kerr, 28, showcased her jaw-dropping figure (she gave birth to son Flynn five months ago) in a black Michael Kors skirt and top with cut-out side panels and a gold belt at Monday night's CFDA Awards.

PHOTOS: CFDA Awards 2011: What all the stars wore

Halle Berry had everyone talking when the 44-year-old actress showed up at the FiFi Awards in a black Halston midriff with a large asymmetrical cut-out and a sexy slit up the front.

PHOTOS: Halle Berry's red carpet style

Howard Stern's stunning wife, Beth Ostrosky Stern, 38, bravely donned a LBD strikingly similar to Berry's just a few days later. The one-shoulder dress revealed Stern's impressive set of abs (and more!).

Poll

Who Looked Best in a Black Cut-Out Dress?

Selena Gomez
Miranda Kerr
Halle Berry
Beth Ostrosky Stern
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Who Looked Best in a Black Cut-Out Dress?