Teenager’s Dream Bathroom

I need advice about remodeling a teenage girl’s bathroom. I am a single father and have recently acquired an older house. I want to do something nice for my daughter, especially since we are moving away from all her friends. I want her to move into the master bedroom, but the bathroom has a shower instead of a tub. I wonder if I could replace the shower with one of the small bathtubs. Does anyone have any ideas about what I could do? I could ask my daughter what she wants, but right now she is so upset. I want to surprise her.