She sure is gorgeous!
Mostly, there are very few problems with removal at this age. It won't take very long, but the anesthesiologist will probably stay with her and monitor her for the whole surgery. Also, her hair will cover up any scar, but at that young age, I'm betting she won't have any scarring issues anyway.
Others will come by and reassure you also. Please come back and give us a post surgery update after the 29th!