Getting big while working out 5 to 6 days a week?

I've been doing Starting Strength for about 3 months, and I don't mind the size, but it's 3 days a week. I'd like to take my workout to 5 days a week to build my body faster.

I've read that celebrities would workout 6-7 days a week for a couple of hours a day, so 5-6 days a week for an hour shouldn't be overkill.

Any recommendations on what programs to do?