Help!! Dog fashion show this weekend.

I don't really know what board to post this to but... My dog is in a fashion show this weekend, nothing like last minute timing! I've been sick and haven't been able to function, today my dad is going to help me. But I need ideas for unique or funny or cute dog fashion. I don't really want something cliche, like a bear or lion.. It can be fashion which id like but can be costume also. I can make something or buy thing to put together. But no where carries is size!! I have a couple ideas in mind but wanted to get other ideas as well. My dog is large! 70 pounds so most likely I will be making it! I'll post a picture of him tell me what you think. Thank you!! I need an idea today! 10/4/17