Jessie James Decker shows off toned bikini body after months-long fitness transformation

Jessie James Decker is flaunting her fitness transformation.

While the country singer has always been in shape, she took to social media this week to share a variety of photos and videos of her new, more toned look – including before and after bikini photos.

"This past week in the Hamptons, a woman complimented my arms and said, 'Gosh, I could probably never have arms like yours,'" Decker wrote. "I looked at her and said, 'Girl, I didn’t have these arms in April!'"

HILARIA BALDWIN...