The 39-year-old country star revealed that he's hit a major milestone in his weight loss journey, dropping an impressive 100 pounds ... just six months after he revealed a 70-pound weight loss ...

And recently, the 23-year-old showed off her 100-pound weight loss in an "inspiring" before-and-after video. On Monday, Aug. 26, Jazz took to Instagram with an update on her wellness journey.

Jazz Jennings is sharing before-and-after footage of her 100-pound weight loss, saying she is "so proud ... In a recent interview with Men's Health, chef and Food Network star Guy Fieri reveals ...