Are my plants dead after a frost?

I live in Tennessee and we had nice warm weather so I planted some shrubs and flowers. We then had a big freeze and I woke up to my leaves wilted on my plants and my flowers dead. I have had other shubs out there for over a year. My question is even though the leaves wilted off of my shrubs, are the plants dead, or will they sprout new leaves. It's been about a month since the freeze and my plants look the same. Do I just need to pull them up and plant new shrubs or will they come back?