the fast, simple system you can stick with, from celebrity fitness and nutrition sensation autumn calabrese. >> even too much of healthy food can pack on the pounds. let me show you how my color-coded containers help you eat the right satisfying portions of the foods you love. plus, with my quick, 30 minute daily workouts you can stick with, you will lose weight. you don't need 90 days. you don't even need 60 days to see results. you just give me 30 minutes a day for 21 days, and i promise you the weight will come off. >> thanks to the 21 day fix, i've lost 10 pounds and 13 inches. >> i lost 13 pounds and 13 inches -- 21 days with autumn. >> announcer: it's no wonder that the 21 day fix has quickly become a fitness phenomena and is already the fastest-selling program ever produced by the biggest name in fitness -- beachbody, the company behind p90x and insanity. and today, autumn and america's favorite host, tom bergeron, are going to share incredible stories of people who wanted to get in shape fast. >> i lost 15 pounds in my first round. >> wow. all right. >> yeah, so... >> announcer: and