Sexy Stars: Erin Andrews flashes her undies and Susan Sarandon is a total babe in red

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Skin is in!

With all the skin-bering styles on the red carpet this week, we momentarily forgot it's still the middle of winter.

"Dancing With the Stars" host Erin Andrews flashed her undies in a see-through off-the-shoulder ensemble, while Sienna Miller exposed a bit of her lady parts in a floral frock of the same sheerness.

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Sexy Stars: Week of February 13
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Sexy Stars: Week of February 13

Dare to bare! Erin Andrews flashed her undies in a super sheer purple dress.

(Photo by Jason LaVeris/FilmMagic)

The seemingly ageless Catherine Zeta Jones rocked an off-the-shoulder LBD that hugged her tiny frame.

(Photo by Rabbani and Solimene Photography/Getty Images)

Sienna Miller flashed a bit of her lady parts in a floral see-through frock.

(Photo by Rune Hellestad - Corbis/Corbis via Getty Images)

That's hot! Paris Hilton looked totally glam in a semi-sheer silver look that she wore with a fur shawl over.

(Photo by Nicholas Hunt/Getty Images for New York Fashion Week: The Shows)

Paris Hilton opted for a more feminine, colorful off-the-shoulder style with some black pumps.

(Photo by Nicholas Hunt/Getty Images for New York Fashion Week: The Shows)

Victoria Justice looked oh-so-classy in a deep violet figure-hugging ensemble with fancy lace detailing. 

(Photo by Jason LaVeris/FilmMagic)

Lady in red! Susan Sarandon wore a slinky velvet number on Valentine's Day -- and she couldn't have looked more stunning!

(Photo by Paul Bruinooge/Patrick McMullan via Getty Images)

Wowza! Ashley Greene showed a hint of leg in a white floor-length ensemble.

(Photo by Amanda Edwards/WireImage)

Cutout queen! Destry Allyn Spielberg rocked a revealing dark ensemble she matched with pointy pumps.

(Photo by Jason LaVeris/FilmMagic)

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Paris Hilton was quite the social butterfly this week, hitting it out of the ballpark in the style department on several occasions.

And of course, Catherine Zeta-Jones looked flawless in a classic LBD that hugged her teeny frame.

Check out all the sexy looks from the week in the slideshow above!

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Celeb Spotter 005: NYFW-ready celebs descend upon NYC
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Celeb Spotter 005: NYFW-ready celebs descend upon NYC
Kim Kardashian West flashed her bra while out and about in NYC with BFF Lala Anthony. (Photo by Marc Piasecki/GC Images)

Hailey Baldwin and Madison Beer leave celeb hot spot Kola House after a private Teen Vogue dinner during NYFW.

(Credit: Michael Stewart)

Sister, sister! Paris Hilton and Nicky Hilton Rothschild are seen arriving at the Oscar de la Renta NYFW show. (Photo by Gilbert Carrasquillo/GC Images)
Kylie Jenner looked glam in NYC this week. (Photo by Pierre Suu/GC Images)

Blake Lively takes a selfie at L'Oréal Paris' Galentine's Day event at West Edge in NYC.

(Credit: Don Bowers, Getty)

Kanye West stepped out in NYC two days ahead of his Yeezy Season 5 fashion show. (Photo by Raymond Hall/GC Images)
Olivia Palermo attended the Carolina Herrera show during NYFW. (Photo by Gilbert Carrasquillo/GC Images)
Lindsay Lohan looked absolutely gorgeous while out and about in Midtown Manhattan. (Photo by Raymond Hall/GC Images)
Kim Kardashian West stepped out in Valentine's Day in a massive fur coat. (Photo by Marc Piasecki/GC Images)
Bella Hadid kept warm during NYFW. (Photo by Gilbert Carrasquillo/GC Images)
Rachel Zoe embraced old Hollwood glamour at NYFW this week. (Photo by Gilbert Carrasquillo/GC Images)
Nicky Hilton Rothschild was pretty in polkadots at New York Fashion Week. (Photo by Gilbert Carrasquillo/GC Images)
Kylie Jenner and Tyga continued to dominate the NYFW discussion this week, rocking some bizarre over-the-knee boots. (Photo by Raymond Hall/GC Images)
Paris Hilton and Nicky Hilton Rothschild rocked some fierce looks at NYFW. (Photo by Gilbert Carrasquillo/GC Images)
Gigi Hadid donned some fire engine red pants while walking in SoHo. (Photo by Raymond Hall/GC Images)
Kim Kardashian kept it casual as she arrived in NYC from LA. (Photo by Pierre Suu/GC Images)
Casey Affleck going for a hike or arriving at LAX? (Photo by starzfly/Bauer-Griffin/GC Images)
Khloe Kardashian arrived at LAX with a super cute Birkin in Tiffany Blue. (Photo by starzfly/Bauer-Griffin/GC Images)
Anwar Hadid was snapped leaving his older sister, Gigi's, apartment in NYC wearing some swaggy plaid pants. (Photo by Alo Ceballos/GC Images)
Pamela Anderson was gorgeous in gray in London. (Photo by Neil Mockford/GC Images)
Emma Stone was all smiles while arriving at a BAFTAs after party this weekend. (Photo by Ricky Vigil/GC Images)
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