I'm taking a guess but Katie Gold.
Liv Wylder, an other - nearly - flat chested blonde :
http://galleries.gloryhole.com/pics/01/index.php?content=liv_wylder&nats=dogs2fuck:pps30:gloryhole
Pix from ATKingdom :
http://www.picsmaster.net/gallery/atk/3f5529/ (The ATK Galleria)
I do not see what is so hot about flat chested girls. Cleavage FTW. You cant even tit fuck flat girls. They also don't look good in dresses and bikinis.
I like both but I have to say I favor small, petite woman and they usually have smaller breasts. To each his own.. See example below...
http://www.coryheart.com/tgpgalleries/ch-n13/index.php?code=945441
http://www.galleryhost.com/642953/1/jennyheart/custom/jhtpgblackthong01/
http://www.dailytemptation.com/redhead/0311/06/galp12.html
http://www.pspsexpictures.com/18onlygirls/smoothslit/teen.html
http://www.realhotsex.com/hosted/sites/bigleaguefacials/mov101/ng.html
http://www.pussylipz.com/07/flat/smut27.html
Angel Long maybe off the top off my head.