"Why is it so pretty?"

Translation: Hvorfor er det så flot?

[Jorge_bogbos]

related question. What is the difference between "smuk" and "flot"? Are they used to describe beauty/prettiness of different things?

[MarieOJ]

I believe "pæn" and "flot" are synonyms - why is using the word "pæn" a mistake?

[Hedebygade]

"Pæn" is for n-words, but you need the t-word version "pænt" because it's "det" not "den".

[Ridderdans]

"Kønt" is also a synonym for pretty