Off topic, but why do girls dress nicer for a wedding than they do for Shabbos Kodesh”
Do a kallah and chosson not dress up more than for a typical Shabbos? Clearly the chassunah has a certain sartorial status that begs the wearing of a certain type of clothing. Nonetheless, people SHOULD dress up for Shabbos in their best clothing, even if not wedding style.
(Also, some girls want to make Shidduchim, and they will be seen by and converse with more people at the wedding than on a typical Shabbos at Shul)