Last week Nicole Richie urged girls to steer clear of racy, skin-revealing Halloween costumes this year.

"Girls, can we all pledge that we will not dress slutty for this Halloween?" the 30-year-old posted on her Facebook page Thursday. "The jig is up!"

And to appease the mom-of-two, who dressed up as Jennifer Lopez on Saturday night, Us Weekly editors Andrea Lavinthal and Justin Ravitz came up with several celeb-inspired costume ideas that are anything but sexy.

Watch the video above!