A few years ago I bought a hairpiece from Cheerleader Hairpieces. I used it for my sister's wedding. At the time, this is how short my hair was (as this photo was taken the night before the wedding):
And here is my updo the next day with the Hailey style bun from cheerleaderhairpieces.com:
I'm considering using the same hairpiece or buying this new style that can easily be clipped and pinned into my hair to give it more fullness (Wonder Style; it is only $14.99!):
The cons to these hairpieces are that you cannot curl them. However I didn't mind that and just curled my own hair to add to my updo to match the "curl" in the hairpiece.
This is my updo inspiration for my own wedding: