I know, I know, we have lots of time before we go dressing up and tearing up the town, but just hear me out

I have a party at the end of next month at a friend's house, and they ALWAYS dress up, sing songs and just have fun. Since I haven't been in a costume since I was a kid (ALWAYS a witch. I had no imagination), I wanted to know if any of you dear freaks had any ideas. Since I'm big, I have this fear that I'll make anything I dress up as look RIDICULOUS.
So does anyone have any tips or something for me? Anything is appreciated!
