I'll be there March 29th also, and, luckily, we're all 16 (almost 17 for me!). I'm thinking if they ask for ID, just flash your learner's permit/driver's license or school ID, and hopefully the security person won't look at the date, just the year. And, if they look at your actual birth date, I doubt any person would be so cold hearted as to not let you in.
Honestly, though, I doubt you'll be checked for ID. I can't remember the last time they've asked for ID at a movie or show for me...I must have been 12! I don't think they'll care.
Good luck! See you at the show!!!!