Tim McGraw is 45 and fine!

The country superstar proved that wife Faith Hill is a lucky lady this weekend -- when he posted a shirtless photo of himself on his Twitter page Friday afternoon.

"This is a shoe that can really make a man feel inadequate," Tim wrote with the photo, which shows him holding a massive piece of footwear.

But it's not the cleat attracting attention.

"i don't think anyone is gonna be lookin at the shoe! " one of his Twitter followers wrote below the pic ... and we agree!

Check out more Fit & Over 40 stars in the gallery above.

Hot Videos