Mother-of-three Faith Hill shows off her knockout figure on the December cover of Shape Magazine.

“Wearing a bikini on a magazine cover is my 41st birthday present to myself,” Faith says in the latest issue of the fitness mag, on newsstands November 10.

The country star credits her trim physique to a strict exercise regimen of Pilates three times a week.

“I could bend in ways I haven’t been able to since I was a teenager.”

“My husband (Tim McGraw) loves it!” she adds.