Kristal Summers, real name Krista Grabowski, was born in Santa Monica, California and is the cousin of porn star Francesca Lé. Francesca is credited with getting Kristal into porn - bdsm porn to be exact. She started out doing softcore BDSM stuff (some fetish dress up, slap and tickle) in the late 1990's. She did this work under the name Brandy and was a brunette.
In 1999 she had her natural C cup boobs augmented up to their current DD size and turned more mainstream in the following year. She has worked under the names Shayla Summers and Crystal Summers as well. Her official site that she runs is here