These girls dressed up as the Final Five and Simone Biles loved it

Themed costumes at Halloween can be a lot of fun.

The key is picking something topical, getting like-minded people to join you and making it look authentic.

These five girls managed to pull off the trifecta.

They dressed up as the Final Five -- the US Women's gymnastics team that won gold in Rio over the summer. And while anybody can dress the part, it's pretty darn cool when Simone Biles (who won 4 gold medals in Rio) shows up on your Instagram feed and cosigns it.

Check it out:

#winning indeed.