i'd really suggest making urself up.
my prom is coming up too, so i'm getting foundation, blusher and lipgloss.
more than enough, especially for someone who's never touched make up b4 in ur whole life, like me. at most it should cost rm50 for this 3.
Anyway..... by doing it on the day itself,
1) you may not like the style
2) you can be allergic (this is VERY common)
3) too exp

at least if u get ur own makeup, you can try it out b4 the day itself.
at least, that's what i'm planning to do.
or you can get your best buds to gather and make each other up

or if your prom is after mine you can buy mine or something lah. since i'm not using them anymore anyway.

my make up skill is... non existent. hahahaha! honestly, i've never touched make up in my whole life.
but i think it should be quite okay lah. ><
if not, just get ur mom to help you
i think shu eumura will probably be even more exp......