ST. PAUL, Minn. — “The Biggest Loser” finales are always eye-opening. Tuesday’s was jaw-dropping. Stillwater native Rachel Frederickson won the popular NBC weight loss TV show and took home $250,000 by shedding 60 percent of her body weight. It was a record-setting weigh-in with the 24-year-old former high school swimming champ dropping a higher percentage of body weight than anyone in the show’s 15-season history. From the moment she walked onstage, Frederickson’s thin 5-foot-4 frame had folks taking to social media wondering if she had lost too much weight.