This week's style standouts have mastered the art of sexy sophistication.

One of our favorite fashionistas, Tracee Ellis Ross, showed some skin in a simple yet sultry one-shoulder LBD while attending HollyRod Foundation’s 14th Annual DesignCare event in Malibu last Saturday. It was the perfect frock to dance the night away at the event thrown by Holly Robinson Peete and husband Rodney Peete to raise money for Parkinson’s disease and Autism research.

Eve was also out and about lending her superstar status to an amazing cause this week. The rapper/actress celebrated "Together To End AIDS: An Evening To Benefit amfAR and GBCHealth" at John F. Kennedy Center for the Performing Arts in Washington, D.C. Her long, peach hued shirtdress was spiced up with a v-neck revealing her famous cat claw tattoos and a high slit (made even higher with a few undone buttons) showing of her gorgeous gams.

But our favorite style moment of the week comes courtesy of fashion designer Rachel Roy. Her head-turning style has graced many of our best-dressed lists, but it was the sassy black Roland Mouret Jumpsuit the 38-year-old fashionista wore to the New York premiere of "The Campaign" that really made our jaws drop. The midriff and cleaveage-baring cutout design could have skewed too sexy, but Rachel reeled it in with a tailored blazer from her signature collection.

Check out those ladies and the rest of this week's fashion-forward folks in the slideshow below.

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  • Tracee Ellis Ross

    MALIBU, CA - JULY 21: Actress Tracee Ellis Ross attends the 14th Annual DesignCare event at a private residence on July 21, 2012 in Malibu, California. (Photo by David Livingston/Getty Images)

  • Eve

    WASHINGTON, DC - JULY 21: Eve attends Together To End AIDS: An Evening To Benefit amfAR and GBCHealth at John F. Kennedy Center for the Performing Arts on July 21, 2012 in Washington, DC. (Photo by Michael Kovac/FilmMagic)

  • "The Campaign" New York Premiere - Inside Arrivals

    NEW YORK, NY - JULY 25: Designer Rachel Roy attends the 'The Campaign' New York premiere at Landmark's Sunshine Cinema on July 25, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)

  • Sports For Peace - Fundraising Ball

    LONDON, ENGLAND - JULY 25: Actress Rosario Dawson attends the Sports For Peace Fundraising Ball at The V&A on July 25, 2012 in London, England. (Photo by Ian Gavan/Getty Images)

  • Zoe Saldana

    Zoe Saldana poses backstage at the Teen Choice Awards on Sunday, July 22, 2012, in Universal City, Calif. (Photo by Jordan Strauss/Invision/AP)

  • Tamera Mowry-Houseley and Tia Mowry Hardrict

    Tamera Mowry-Houseley and Tia Mowry Hardrict attend the second day of NBCUniversal's 2012 Summer Press Tour at the Beverly Hilton Hotel on Wednesday, July 25, 2012, in Beverly Hills, Calif. (Photo by Jordan Strauss/Invision/AP)

  • Holly Robinson Peete

    MALIBU, CA - JULY 21: Actress Holly Robinson attends the HollyRod Foundation's 14th Annual Design Care on July 21, 2012 in Malibu, California. (Photo by Tiffany Rose/WireImage)

  • Nelly Furtado

    NEW YORK, NY - JULY 24: Nelly Furtado attends Self Magazine 'Rocks The Summer' at Kiss & Fly on July 24, 2012 in New York City. (Photo by D Dipasupil/FilmMagic)

  • Hannah Simone

    UNIVERSAL CITY, CA - JULY 22: Actress Hannah Simone arrives at the 2012 Teen Choice Awards at Gibson Amphitheatre on July 22, 2012 in Universal City, California. (Photo by Jason Merritt/Getty Images)

  • Jessica Alba

    NEW YORK, NY - JULY 25: Jessica Alba sighting on July 25, 2012 in New York City. (Photo by Alo Ceballos/FilmMagic)

  • Melanie Brown

    MALIBU, CA - JULY 21: Recording artist Melanie "Mel B" Brown attends HollyRod Foundation's 14th Annual Design Care on July 21, 2012 in Malibu, California. (Photo by Vivien Killilea/WireImage)

  • Jennifer Lopez

    NEW YORK, NY - JULY 24: Jennifer Lopez celebrates her 43rd birthday with Casper Smart aboard a yacht at Chelsea Piers on July 24, 2012 in New York City. (Photo by James Devaney/FilmMagic)