Thousands of people put their scariest outfits on for America's biggest Halloween events!
In West Hollywood the gruesome costumes were out on Santa Monica Boulevard as the city hosted its annual Halloween celebration.
It's been going on for 23 years and thousands of people come along...
...like this guy dressed up as the Mad Hatter. Organisers expected 500,000 people this year and say it's the largest Halloween party in the world!
Not all the costumes were scary. This group decided to be a bit different and dressed up as their heroes - the Chilean miners!
Either this guy decided to dress up as his favourite room in his house... or is taking a scene from his favourite horror movie.
And some people decided they'd go back in time - nice wigs guys!