What can I wear to my sister sweet 16 party?

So I just turned 18, and my sisters 16 is coming up very soon. I hate to say it, but I have never been to a sweet 16, and I rarely go to parties. Im so used to wearing black slacks, dress shoes, and a long sleeve dress shirt (I often roll up the sleeves). I wear that attire whenever I go to a large family dinner or holiday celebration. But to my sisters sweet 16, a very special event, what should I wear? For some odd reason, my sister thinks I will look good in a sweater vest. But what do you think is nice to wear? Also, if I do wear a sweater vest, do I wear a tie or no tie/ jeans or slacks/ etc.?What can I wear to my sister sweet 16 party?
Honey let me tell you its a party so you have to be dressed like you are going to a party and its not just any party its a sweet 16 and your sisters?? Hmm I would wear a black skirt with a nice dressed shirt and some closed toe heels with a thick heel for more comfort also if you feel uncomfortable showing leg put some black tights on not leggings but like the silky thin kind black is always good:) or a dress nothing too sexy when wearing a dress I would say if you are going to show leg cover up on top here are some cute clothes I found hope I helped oh and also remember accessories:)

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http://m.gojane.com/65895-dresses-metall鈥?/a>What can I wear to my sister sweet 16 party?
You should go all out. Don't wear only black....you aren't at a funeral and the time for blending into the background is over! Wear a vest, like she wants you to, with a tie to match...only if you find a great one to go with the vest, a vest could also stand alone!

Really, you could let her or another gal your age pick something out. (Btw,,,Its a great excuse for a date,... to go shopping and lunch!) Nice jeans with a vest and tie looks really good, you don't have to stick with your comfy black clothes! Shave. Remember to get a NICE haircut.....spend a little more, it usually shows. Smell awesome, that IS hugely important! Plus, its a nice thing for you to do as your sister asks for THIS occassion. It'a a special day for her, and with you putting in more effort, I bet it will not go unnoticed!! You will make your sister happy, even buy har a rose, or a favorate flower....thats a nice thing for a brother to do! PLUS...have fun at her party and remember to ask her to dance with you! (no excuses, there are music videos to watch,and they teach dance moves online!) You will never get it back, some memories only have just one potential to make them. Really, when you get older.....like when your own daughter's sweet 16th comes around, it will trigger your happy memory, and you will still get a smile from it, all those years later. (Make sure you loosen up, enough to be fun/funny....but don't ruin it in any way) Have a good time!What can I wear to my sister sweet 16 party?
if its formal i reccomend a dress with heels but if its not that formal and a bit on the casual side i reccomend jeans with a nice top and a nice leather jacket or a cardigan. To my sisters sweet sixteen i wore a black dress with a red cardigan and red 5cm heels.

hope i helped :D