I'll go with Sarah Hayes as the breakout star..nothing against Heather and Marja, but they've been around for a while and established their foothold.
Aleesha Young has shown some significant mass (and vascularity) improvement, but the most significant increase spoken of is the breast enhancement, which distracts from the sport of bodybuiding - so no vote.
Runner up (and very close at that) is Sherri Gray. It appears she may have had breast agumentation, but she really is the "everywoman" bodybuilder. A devoted wife and mother (sure, that may ruin a lot of people's fantasies) but as a 30-something who balances her priorities yet presents a physique that could make any man crawl through barbed-wire, she gets my vote.
Actually, I place her my #1. Her struggle to achieve her dream is more complicated than Sarah Hayes, althoough Sarah has the superiort phyique.
Sherri Gray