If you know your history, you’re less likely to commit a Halloween sin, after all.

There are lines that shouldn’t be crossed, and sometimes celebrities cross them.

These are some of the worst offenders.

Kim Kardashian dressed as Wonder Woman

Still, there are ways to denote this character in a costume that doesn’t involve blackface.

Ashley Tisdale’s Day of the Dead costume

You shouldn’t appropriate other cultures on Halloween.

This includes wearing a Day of the Dead costume, which Ashley Tisdale did in 2016 (viaMetro).

Julianne Hough at “America’s Got Talent”

It’s offensive to trivialize a religion’s deities in this way.

To that end, Chris Brown dressed as the traditional American idea of a terrorist in 2012, perInsider.

With these examples in mind, go forth this Halloween dressed in non-problematic costumes and have fun!

Ashley Tisdale at Beautycon Festival

Heidi Klum at the 2019 CFDA Fashion Awards

Chris Brown at the 2013 Grammy’s