Search for her on other sites using prossie name, telephone number. Often the photos have had different levels of fakery which makes it obvious. There are photoshop detection software pages but they take a while to learn to use. You paste the photo in and flick a few switches to show up things like unevenness of compression which happens when one part of the photo has been saved more than others (did a recent post on this). Others just give a percentage likelihood of it being fake. Too much hassle to use on a regular basis unless you are keen. Better, examine photo visually, enlarging it if your browser can do that. Look for fuzzy joins where they tried to smooth over bits that aren't genuine. Ones that look to good to be true (eg especially smooth flawless skin, more flawless than in real life) are a bit of a giveaway usually, or at least grounds for concern.
For tineye, load it as a Firefox extension and also Right Click to override the AW prevention on using it.