We used to think slips were just something our grandmothers wore. But recently, we've been seeing the usefulness of the undergarment, particularly as our clothes get sheerer and sheerer.

Kim Kardashian was in desperate need of a delicate slip on Wednesday while out in New York with her beau, Kanye West. Kim's black fit-and-flare dress was a perfect choice to flatter her growing figure, but Kim made one mistake: She seemed to forget that the frock was basically see-through.

Luckily, the reality star was wearing a pretty bra and cute lacy briefs (and had Kanye there to block prying eyes). But next time, Kimmy, we recommend trying a slim black slip underneath -- it's barely noticeable and we promise you won't feel like a grandma.

See Kim's latest outfit and take note!

PHOTOS:

kim kardashian underwear

kim kardashian underwear

At least it wasn't this bad...

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  • Britney Spears

  • Nicki Minaj

    October 2012

  • Emma Watson

    (Splash News)

  • Joely Fisher

    June 2012

  • Soo Yoo Jin

    2012

  • Olga Sorokina

    December 2012

  • Valentina Lodovini

    2011

  • Stella Tennant

    2011

  • Jennifer Lopez

    (Pacific Coast News)

  • Kourtney Kardashian

    (Flynet)

  • Kourtney Kardashian

    (Flynet)

  • Jennifer Lopez

    (Pacific Coast News photo)

  • Sofia Vergara

    (Splash)

  • Katy Perry

    (Pacific Coast News photo)

  • Miley Cyrus

    (x17online.com)

  • Kim Kardashian

    (PCN)

  • Kate Moss

    (Flynet photo)

  • Kate Moss

    (INFDaily.com photo)

  • Kate Moss

    (INFDaily.com photo)

  • Kim Kardashian

    (Instagram)

  • Kim Kardashian

    (Flynet photo)

  • Kim Kardashian

  • Micaela Schaefer

    (WireImage photo)

  • Lisa Rinna

    (Getty Photo)

  • Arta Dobroshi

    (Getty photo)

  • Mariah Carey

    (Getty photo)

  • Kanye West

    (Splash News photo)

  • Dakota Fanning

    (Flynet photo)

  • Chloe Sevigny

    (WireImage photo)

  • Amanda Lepore

    2011

  • Melody Thornton

    (Getty Photo)

  • Adrienne Bailon

    (Getty photo)

  • Miley Cyrus

    (AKMGSI photo)

  • Rona Hartner

    (Getty)

  • James Corden

    (Getty)

  • Paula Abdul

    (Getty)

  • Lacey Schwimmer

    (Splash)

  • Amy Smart

    (Splash)

  • Brooke Mueller

    (Getty)

  • Phoebe Price

    (Splash)

  • Lady Gaga

    (Splash)

  • Taylor Swift

    (Splash)

  • Gwyneth Paltrow

    (Splash)

  • Keke Palmer

    (Splash)

  • Kelly Rowland

    (Getty)

  • Josh Hopkins

    (Splash)

  • Blake Lively

    (Getty)

  • Courtney Love

    (Splash)

  • Lauren Conrad

    (Getty)

  • Kate Middleton

    (Getty)

  • Demi Lovato

    (Splash)

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