CHELSEA CLINTON- HORSEBACK BIKINI?

I happened across this photo surfing the internet. this girl looks a lot like chelsea clinton. mey question is "is this  ms clinton, taking riding lessons?
I clicked the link into another tab, and magnified it to 400- and it sure looks like her to me. but i could be wrong. but doesnt this MYSTERY WOMAN look like CHELSEA CLINTON? IS IT HER?ENQUIRING MINDS WANT TO KNOW..
obviously- the dude is a friend, or a riding instuctor..

... http://2.bp.blogspot.com/-Nqz48bY2YnQ/UWUJAhVTgjI/AAAAAAAAGzw/rUsxsZxgEaM/s1600/l.jpg