Hey Liz. If there is no medical need for the removal of female reproductive organs, there are probably no surgeons who would even consider the surgery. I highly doubt that celebrities are getting their uteruses removed just so they don't have their period. Perhaps you've gotten some misleading info? As for women who have had the unfortunate need to have their reproductive organs removed, the vagina is not removed. The surgeon removes the uterus, then sews the vagina closed at the top (where the cervix was) to make a "blind" pouch. Sex would still be possible in this case, as there is a remaining vaginal canal. The woman would still be able to urinate, as the bladder is entirely separate from the vagina and uterus/ovaries. The bladder is connected to the outside of the body by a separate tube (called the urethra), and would be unaffected by this type of surgery. Hope this answers all your questions!
I'm a registered nurse.