Here is the information on the true identity of Bree, which LG15.com broke last night.
The actress who portrays LG15 is Jessica Rose of Mount Maunganui, New Zealand. She is 19 and had recently moved to the Burbank/LA area to pursue an acting career. This information was gleaned from Google's cache of all spidered webpages; if it wasn't for that, the real story would have remained hidden, as all the current webpages that once referenced her have been redacted.
Here are cached pictures of her: 
A couple videos on YouTube broke the news really. Here they are...
