ASHLEY GRAHAM’S SUPERSLIMDOWN!

shedding the baby's weight and more! Ashley Graham, a plus-size model, has lost 20 pounds a year after giving birth.

 from her weight prior to pregnancy.

An insider of the body-positive advocate tells Star, "Ashley has always made a living off being a plus-size woman and is proud of her curves."

 "However, she found it difficult to chase after them and their toddler brother with the extra weight after giving birth."

The insider adds that the 35-year-old and her 12-year-old husband, Justin Ervin, changed their diet and went to the gym.

The source claims that "even though he's always found Ashley sexy," Ervin agreed to assist.

 The outcome: The cover girl for Sports Illustrated, who is 5 feet 10 inches tall, lost 150 pounds.

 The insider asserts, "Ashley loves her new body, and more importantly, she loves how much better she feels."

She enjoys the extra energy she has gained from losing weight.

ASHLEY GRAHAM’S SUPERSLIMDOWN!