It depends who you ask.
The ball python is the prettiest snake in the world.
Kiani is the prettiest name in the world. The meaning kiani means flower in hawaii
my toe its boom
It depends on what everyone decides what they think is the prettiest beach.
Me
You use prettier when you're comparing two people or thing. ex. My mom is prettier than her mom. You use prettiest when your comparing one thing to a lot of things. ex. she is the prettiest of the three Thompson sisters.
usa
the true, prettiest goddess of the world is princess Britt. look at princessbritt.com and you will see it.
Kiana is the most prettiest girl in the world, compared to Famp!
graciie valentina
The prettiest room in the world is the Henry VII Chapel in Westminster Abbey. It has a georgeous ceiling. If you want to see a picture go to this website: http://carolyncastiglia.blogspot.com/2005/01/this-is-prettiest-room-in-world.html
For some people, it is the prettiest color in the world, for some people they personally dislike the color. It is a matter of taste in the eye.