1. She had a puzzled look on her face.

2. She had a confused look on her face.
3. She had a _______ look on her face.
[#1 means #3, doesn't it? What other adjectives can we use for the blank?]

3 answers

Bewildered is one. It means confused. Quizzical might also be used, meaning mildly or amusedly puzzled, questioning.
She had a ( ͡° ͜ʖ ͡°) look on her face.
Ah, my friend, this is nature. The beautiful ( ͡° ͜ʖ ͡°) nature.