It changes so often, you never know what to expect with Rihanna fashion.

Except, of course, that it will be eye-catching and provocative. So in that sense, nothing the music superstar wears can surprise us ... with one possible exception:

A smile!

Who knew she was even capable. We're so used to that tough-as-nails, singular facial expression that we were completely caught off guard by her beautiful smile.

Heck, we barely noticed the spiky mohawk, zebra-patterned jacket or purple sneakers! Tell us what you think of the recovering singer's latest fashion foray ...

ONE OF A KIND: Other than leaked pictures of Rihanna nude, few things catch fans' attention more than the star's eye-popping, enigmatic fashion sense.