2 of my 8 bridesmaids have back/shoulder tattoos that I would prefer not to be seen on my wedding day. We are having a formal wedding and I'd rather it not be a distraction, however, I don't want to offend my girls by asking them to wear their hair down or use cover up. Any advice on how to approach this? I'm especially woried about my one bridesmaid who has recently become rudely outspoken and expressed that she wants to wear her hair up...