A Taylor Swift fan says he lost 400 pounds, with a little help from the pop singer.

Two years ago Ronnie Brower weighed 675 pounds, and his doctor told him he would be dead within a decade if he didn’t make some drastic changes, Yahoo! News reports.

Brower’s friend and former teacher Joe Bufano promised that he would take him to see Swift perform after he lost 400 pounds.

Today, he weighs 250 pounds — having lost the weight by exercising and listening to Swift during his workouts.

“He told me in his darkest days ... he would often listen to Taylor, and it was the messages in her music that kind of gave him some source of joy and happiness. It kept him buying into life,” Bufano told the Daily Dot.

Bufano plans to make good on his promise and is taking Brower to see Swift in concert in June. He says he is hoping the pop star will meet with Bufano before or after the show.