We've all been there.

We've all looked back at an old photo of ourselves at a costume party, red solo cup in hand, pre-2008- recession smile spread across our faces. "Why would I wear that costume?!" we think to ourselves. Even Justin Trudeau has been there once...or twice...or three times. But in most cases, you just can't believe you thought those cat ears were cute or that you decided "sexy Stay Puffed Marshmallow Man" was a good costume idea. Most people don't look back at old costumes and think, "Wow! That was pretty racist and/or culturally insensitive!" You know why? Because of all the things in the world to dress up as, why dress up as something or someone that's racist/culturally insensitive? Because you're lazy and racist and culturally insensitive, that's why! Here are 13 times celebrities were just that for Halloween.

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On This Day: Hip-Hop Forever Changed America

Happy birthday to the world's biggest genre

On this day in 1973, Clive Campbell, the Jamaican-American "selector" known as DJ Kool Herc, hosted a "back to school jam" at 1520 Sedgewick Avenue in the Boogie Down Bronx of New York City.

Armed with a booming sound system and reggae beats, Herc– a shortened nickname for "Hercules"– commanded insatiable audiences across the South Bronx with his unique looping technique called the "Merry-Go Round." "[I knew that] they were waiting for this particular break," Herc later said, "and I got a couple of records that got the same break up in it. I wonder how it would be if I put them all together."

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