Moving Cells Data Down 1 Cell If That 1 Is Empty

I have a Rental Form that i'm working on, and to tidy things up when I print it out, I would like to move a cells data down 1 row if that cell is empty. Here's what I have:

cell b8 - First and Last Name
cell b9 - Address1
cell B10 - Address2
cell b11 - City, State, Zip
cell 12 - Phone #
etc.

Not too many people have an address2, so when that field is empty, I'd like to move Address1's data down to it's position (address2). If address2 has data in it, leave address1 where it is. Simple right? This moving would happen when the command button is hit and the form data goes to sheet 1 which works fine.