Credit: X17online

She's still Nicky from the block!

Nicole Richie stuck to her guns this Halloween and avoided wearing a "slutty" costume at Kate Hudson's bash in the Pacific Palisades Saturday night. Still, Richie managed to impersonate one of Hollywood's sexiest icons: Jennifer Lopez!

For her funny but prim J Lo getup, Richie, 30, donned the 42-year-old diva's iconic pink sweatsuit, oversized gold aviators, huge hoop earrings, accessorized with a Louis Vuitton bag; she wore her hair up in a bun and even made sure her skin matched Lopez's gorgeous golden glow.

On Thursday, the designer, Hollywood kid and mother of two pleaded on her Facebook page: "Girls, can we all pledge that we will not dress slutty for this Halloween? The jig is up!" See more pics of Nicole as J-Lo from PopSugar.

The mom to daughter Harlow, 3, and son Sparrow, 2, has successfully avoided "slutty" getups for several Halloweens. In 2010, she was dowdy Margot Tenanbaum from The Royal Tenanbaums and peppy Jessie the Cowgirl from the Toy Story films; in 2009, she covered up as the White Rabbit from Alice in Wonderland.

Tell Us: Should Jennifer Lopez be flattered? Should she be Nicole Richie for Halloween?