Fab or flop: Kelly Osbourne's floral dress, Diane Kruger's lace skirt and more

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Fab or Flop: Week of Aug. 7
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Fab or Flop: Week of Aug. 7

Flop: Kelly Osbourne looked totally outlandish in a tent-like high-low dress in a loud, floral print. A baseball jacket, purple topknot and studded heels also clashed with the look. 

(Photo by Alo Ceballos/GC Images)

Fab: Stephanie Pratt stunned in a gorgeous printed midi dress and multi-colored metallic heels. A shiny 'do and neutral makeup completed her pretty look.

(Photo by David M. Benett/Dave Benett/WireImage)

Flop: Diane Kruger missed the mark in an oversized blue buttondown tucked into a totally sheer lace skirt and a completely mismatched pink souvenir jacket to top it all off.

(Photo by Josiah Kamau/BuzzFoto via Getty Images)

Fab: The actress redeemed herself in a cool leather moto skirt, chic black accessories and a denim jacket.

(Photo by Josiah Kamau/BuzzFoto via Getty Images)

Flop: Chantel Jeffries upped the tack factor in this beachy maxi dress with a plunging halter top and open back.

(Photo by Amanda Edwards/Getty Images)

Fab: Actress Chloe Lukasiak dazzled in a Cinderella-esque blue lace tiered dress with a black accent belt. Polished waves and strappy sandals completed her look.

(Photo by Jason LaVeris/FilmMagic)

Flop: Fergie looked silly in this outlandish, '80s-inspired look that included a clunky gold statement belt and newsboy-esque cap. 

(Photo credit should read JEAN BAPTISTE LACROIX/AFP/Getty Images)

Fab: Alessandra Ambrosio flashed her washboard abs in a sexy black striped two-piece ensemble with culotte pants and a spaghetti strap crop top. Sky-high leather sandals and a pendant necklace completed her hot look.

(Photo by Pascal Le Segretain/Getty Images for Coca-Cola)

Flop: Sorry, Ariel Winter. If it's warm enough for booty-baring Daisy Dukes, it probably isn't appropriate to wear over-the-knee suede boots, too!  

(Photo by Stone-e/Bauer-Griffin/GC Images)

Fab: Cat Deeley was a classic beauty in white jeans, a crisp buttondown, Celine bag and camel heeled sandals.

(Photo by BG002/Bauer-Griffin/GC Images)

Flop: Camilla Belle looked silly in tiered, ruffled black pants and a frumpy gray cold shoulder tee. 

(Photo by David Crotty/Patrick McMullan via Getty Images)

Fab: Cat Deeley stunned again in an adorable plaid minidress and cute Mary Jane heels. Pin straight locks and thick mascara completed her Twiggy-ish vibe.

(Photo by JB Lacroix/WireImage)

Flop: Christina Milian  

(Photo by JB Lacroix/WireImage)

Fab: Jillian Murray wowed in a strapless, striped midi tea dress.

(Photo by JB Lacroix/WireImage)

Flop: We're not sold on Brooke Burke-Charvet's pinstriped sleeveless suit with too-long pantlegs.

(Photo by Jason LaVeris/FilmMagic)

Fab: Actress Elaine Hendrix turned heads in a form-fitting red suit with a plunging neckline and nothing underneath. She styled her look with nude heels, red lips and an edgy, slicked-back 'do.

(Photo by Amanda Edwards/WireImage)

Flop: Victoria Justice lamé shirt and thick statement belt were a little too '80s for our taste.

(Photo by David Livingston/Getty Images)

Fab: Ali Larter stunned in a neutral colorblocked bodycon dress, beachy waves and strappy nude sandals.

(Photo by JB Lacroix/WireImage)

Flop: Allison Holker appeared to have some fabric missing on her dramatic cutout dress. Paired with bold, asymmetrical sandals, the look was an eyesore.

(Photo by Gregg DeGuire/WireImage)

Fab: Jordana Brewster's tasteful cutouts were alluring without being over-the-top -- and we love her lace-up sandals.

(Photo by JB Lacroix/WireImage)

Flop: Keri Hilson channeled Britney circa 2001 -- and we definitely weren't ready to see the floor-length denim gown again.

(Photo by Prince Williams/WireImage)

Fab: Rita Ora was effortlessly cool in a simple white tank tucked into edgy printed cropped pants.

 (Photo by Raymond Hall/GC Images)

Flop: Where to begin? Between her clunky wedges, her leather moto everything and exposed lace bra, Mariah Carey served up a little too much look and upped the cheese factor.

(Photo by Jason LaVeris/FilmMagic)

Fab: Nicole Scherzinger was white-hot in a sexy white two-piece number.

(Photo by Jason LaVeris/FilmMagic)

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Call the fashion police! Oh, wait ...

Kelly Osbourne should take some of her own advice. The former "Fashion Police" co-host looked totally outlandish this week in a tent-like high-low dress in a loud, floral print. A baseball jacket, purple topknot and studded heels also clashed with the look.

Osbourne wasn't the only one to turn heads for the wrong reasons this week. Diane Kruger also missed the mark in an oversized blue buttondown tucked into a totally sheer lace skirt and a completely mismatched pink souvenir jacket to top it all off.

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

Where Osbourne and Kruger flopped, other stars kept things simple in winning styles. Stephanie Pratt stunned in a gorgeous printed midi dress -- but let the frock shine with minimal accessories. Alessandra Ambrosio also wowed in a sexy black striped two-piece ensemble with culotte pants and a spaghetti strap crop top. Sky-high leather sandals and a pendant necklace completed her hot look.

See this week's best and worst dressed celebs in the slideshow above.

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