EXTREME MAKEOVER: WEIGHT LOSS EDITION - "Ashley" -- On her 20th birthday, Ashley, the fashion conscious, Hollywood-adoring cosmetology student, receives the ultimate gift when trainer Chris Powell tells her that he will guide her through a body transformation process that will change her life forever. It is Ashley's goal that, by the final weigh-in on her 21st birthday, she will have lost one-half of her 323 pounds. However, the weight loss journey is not without its challenges for this Rancho Cucamonga, California resident. Living at home and without a driver's license, Ashley is dependent on her mother and seeks much-needed support from her and her sisters. As Ashley transforms her body, Chris encourages her to take great emotional steps to change her relationship with her estranged father. Along the way, she goes to Hawaii where she takes a leap of faith, on "Extreme Makeover: Weight Loss Edition," SUNDAY, JULY 8 (9:00-11:00 p.m., ET) on the ABC Television Network. (ABC/CRAIG SJODIN) ASHLEY, DR. SCHAACK