Be bold, be beautiful, be you. Fuck what anyone else thinks.
If you feel comfortable in a certain outfit and it makes you feel confident, go for it! If you worry black lipstick is a little too edgy but you've always wanted to try it, go for it! Even for just once. If you're a guy and you wanted to experiment with makeup for any kind, be it foundation or eye makeup, go for it! On the bigger side and want to wear a crop top? Go for it!
I could go on and on but the point is, fashion is an expression and undefined. You can be anything you want to be in the world of fashion. Most importantly, be you. Be you in whatever terms you define it. No one else can define it except for you. Be true to yourself.
Fashion is an art form. You can get as crazy or as simple as you like. You can be modest or wild. Art is what you make of it. You are the Picasso of your closet.
The best thing about clothes? You can take them off. You can interchange them. You mix it up as little or as much as you like. You are the master of your own closet.
You can wear pieces that maybe you normally wouldn't wear, such as a bright color in amongst a wardrobe of black. You can shake it up. You will look gorgeous no matter what.
Has anyone called your outfit ugly? Do you think your outfit is cute? Yes? Then fuck 'em. They don't know shit about you're fashion. They don't get to dictate what you wear, because what you wear is up to you, not them. Be confident in your choices and no one can control them.
Always remember, Beauty is defined in your soul. It doesn't matter what you wear. Clothes are just an accessory to decorate your avatar through life. Be happy with being you.