The color of her hair appears to be a honey light brown/blonde. Here we see her long hair styled simply with a side part and smoothed all over. This would be a good style for you if you have naturally straight hair and a
youthful face. Block your clean dry hair off in the sections on the sides, top, crown and middle of the back and bottom. A good tip is to always use a spray fixative when you use your flat iron for more control. Apply a
smoothing crème when done and spray if desired.
Just between you and me and the gatepost, I believe Katrina has hair extensions under that top layer of hair. Extensions are definitely in vogue. Her red evening dress would increase the identity of her figure and face if her
hair were styled up in irregular curls with sprigs going every which way. If not curls, then a simple twist with the resilience of her hair fanning about.