I actually didn't even hear about this until I looked up popular trends on Twitter (do you use Twitter? Follow me @thatprettichick!) and saw 'Tiger Woods' and the explanation. I did some Googleing and found a few recordings.
I guess the voice sounds like him, but Jesus Christ, people.
According to a mysterious, unnamed source (read: my stepmom, who saw it on the news- hey, it isn't like I gave her name out!), the woman was paid $25,000 to claim she had twenty encounters with Tiger.