You're doing it all backwards man? WHAT"S UP WITH THAT?!?!?!?! (incidentally, for my 21st I didn't even get that drunk. You may not either if you're used to it by then. It'll depend for you more on whether your 21st falls on a night that you DON'T have to work the next day, or that you DO. Just letting you know what to expect in a few years).
Alexi