it's her. Find a pic of her with a full face shot - the closer the better .
Compare it to the lower half face in the purple yoga pants picture.
I found a youtube ( I believe ) video in which she wore these pants while I was searching.
This looks like a shot for a fitness mag or something and turns up 71 times in a Google search of the image with the name "Rachel Buschert Vaziralli" entered with it.
I'd take the time to find the video again but don't have time right now to do it.
OR cut and paste large images of her face and the half face side by side.
It's her.
I may be wrong but I doubt it.