Don't know BGP well. Change IP for an existing BGP Neighbor

In a little over my head when it comes to BGP. One of my locations on MPLS is having a new circuit delivered. Replacing 8 T1's with fiber, finally.

Didn't care about the IP at the time, so I told the provider to keep it simple and don't worry about porting the IP. Now I'm second guessing remembering that BGP is in the mix.

If I change the IP on the existing interface for the new circuit, will BGP continue to just function? Or do I need to make changes to the others on the MPLS?

Google is failing me in my search. I'm assuming it's not something that comes up often.