So first and foremost, I am not a controlling person at all, and if any of my bridesmaids had a huge issue with it I would let it go...but...
Is it completely unacceptable to ask bridesmaids to do their hair and make-up the same exact way? This mostly comes from the fact that I would just like the uniform look of them all looking the same (ok not look the same, they are different ethniticities/hair color/height/etc/etc, but it would be a nice way to tie everything together). I think it would accentuate the ceremony and pictures nicely. Also, I have chosen a relatively simple hair style that would work/look great on all bridesmaids hair. I also like it because there's would be up and mine would be down.
And lastly, I'm going to PAY FOR IT. In my opinion, if it's my big day, and I'm footing the bill, I don't think it's completely unreasonable. Also, I promise I would wear whatever hairstyle/dress they would ever force me into for their wedding

Just want some opinions I guess...