Tim McGraw -- I Like It, I Love It, I Want Some More of It! (PHOTOS)

Tim McGraw ... talk about country strong.

Guests at the Hotel Del Coronado near San Diego were stunned when a semi-exposed and hairless Tim put on a gun show before performing at his own show later that night.

The country star -- who turns 48 today -- credits his godly physique to the Paleo diet and CrossFit.