Great work! Expert composition, exposure, posing, and use of flash.
How did you use the flash? With any kind of modifier? With any kind of flash compensation? (The lighting effect is properly subtle.)
Where did you find the model? Oh, those Polish girls.... (and I hear they like Americans!) She's a beauty, that's for sure.
If I can quibble (for your skills far outstrip mine): I didn't care for the last shot. Your model is stunning, but that outfit's back design, the pose, and the expression on her face do her no favors.
Perhaps try the same shot again, but with a different outfit?