Happy Birthday!
I take Morgan in the shower with me every weekend. I find its the easiest way. I hate bending over the side of the tub when I'm just washing her and I usually end up getting wet so i figure why not just get in the tub with her. I wash her hair first, then mine, then condition her, and then condition mine. Works great. While I am finishing up I put her outside the tub so she can roll around on some towels to dry off. Lastly I blow dry and brush her hair, then do the same for myself.