FI and I are each having only one attendant each- my sister, his brother. Not for even sides, we just want it that way 
We have a close friend who is throwing me a shower, will be doing my hair, makeup, has been a rockstar about the whole wedding- offering to help address invitaitons, no less! I would like to honor her on the wedding day, perhaps with a corsage? My mom and gma will be getting corsages (FI has very little family) and they have no problem with it.
We have another close friend who will be doing all the ceremony music for us, and I was wondering if we should get him a boutonniere along with FI, groomsmen, dads (again, no complaints).
We will be getting these friends gifts, but I wanted some way to recognize them on our wedding day, as well.
I'm probably over thinking this, but I know you'll set me straight, help me avoid any etiquette pitfalls, and offer suggestions. TIA!