What is this genre called?

I keep seeing these mini dresses that look like cartoon, sanrio, muppet things. What is it all about? Each picture is a link to an etsy shop where this style is featured. Comment if you can help me out with what is going on here. It looks fun, but I don't think I could pull it off.

Example one:


Example two:


Example three:

There are more. Many more. Help a sister out.