It's the only day of the year when a celeb might go unrecognized!

Halloween is upon us, and Hollywood is suited up and ready to do some trick-or-treating! A variety of famous faces showed off their costumes on social media, and we have to give everyone props for their creativity! Our favorite? Beyonce and Blue Ivy as Salt-n-Pepa.

Other good ones are Kourtney Kardashian and her kids as Power Rangers, Nicole Richie and a pal as Siegfried and Roy, and Martha Stewart as a bloody nurse.

We wonder how Tyga feels about his son King Cairo going as his soon-to-be stepdad Rob Kardashian? Blac Chyna (also dressed as Rob!) helped their little one get decked out in a Dodgers hat, Gucci shower slides, and a black sweatsuit to go as the sock designer, and we doubt T-Raww appreciated this one!

Check out all the rest in our gallery below.