Before the finale's moment of truth on 'Thintervention With Jackie Warner' (Mon., 10PM ET on BRAVO), Jackie's weight-loss clients had six weeks on their own.

For Los Angeles resident Nikki, sticking with the program required changing her social calendar. "I had to wrangle up my friends to get on the support thing, and they did. But it was very difficult to transition from not calling to cocktail, calling to hike," admitted Nikki.

She added, "My ass if finally shrinking." Yet with two weeks to go, Nikki struggled to remain consistent with the routine. But at the final meeting, Nikki looked fabulous.