Darths & Droids had a number of jokes about Amidala's dresses, from guessing their armor class, to some funny foreshadowing when Jim is told not to wear the dresses when he's a Jedi, but ends up playing Amidala later on.
Several in Dominic Deegan, especially Amelia's clothes, like a dressing gown heavily trimmed with fur.
Drowtales has some pretty elaborate costumes, but the dress worn by the Empress Diva'ratrika (though only seen for one panel and in concept art) is especially fancy. Note that the moon decoration appears to be part of the dress itself. She appears much more in the side story "The Longest Wait", which is actually centered on her, though that version of her outfit is much less fancy.
Dubious Company has this spoofed with Mary invoking this trope.
The bread and butter of the "Harvest Festival" arc from Las Lindas. Thanks to Digit, all the girls get suitably pimped out dressed, and even Alejandra got in on the act... though hers didn't stay on for long. Another one for that arc was Mora wearing her mother's dress that was blue and white, with puff sleeves, and had a purple stole with tassels. Digit decided to magically pimp it out further so it was all sparkling white with the fabric making a flowing slit in the skirt, and floating large tassels for sleeves, so she could make a Grand Staircase Entrance.
"On the topic of ballroom scenes, Jessica Queen is sort of like my sole reason to sneak in all those gorgeous period dresses and furniture..."
In MegaTokyo, Erika's new dress in strip 1222 is definitely pimped out. It's loaded with black lace, chain trimmings on the bustier and waist, metal gauntlets, and bunny ears. It certainly gets an impressed reaction from Largo (whose own clothes are rather blinged out as well, complete with hamster and a Nice Hat that looks like he stole it from Girl Genius).
