According to KnightJJ's webcomic Place of Princes, it would involve a bit of crossdressing fun and a whole lot of singing.
The Netherlands-based artist has been posting these goofy short comics to her Tumblr and deviantART gallery. There have been tons of comics playing with the Disney princesses, and here their male counterparts get a turn at some good-natured silliness. She also has prints (including a few Disney-themed pieces) available for sale at Society6.
There are seven installments of Place of Princes so far, and I'm rather partial to the most recent one:
Place of Princes [The Art of KnightJJ]