John Schneider: Jessica Simpson Ain't Got Nothing On Real Daisy Duke

Jessica Simpson made a lot of jaws drop when she popped up in Mexico, back in her Daisy Dukes -- but the OG Bo Duke was not among them.

We got John Schneider at LAX, and he immediately sides with his ex co-star Catherine Bach as the only true DD.

Check out the 'Dukes of Hazzard' star's reaction when he saw the pic of Jessica on vacay. He's not saying Jessica's NOT hot, but it's clear who HE thinks is hotter.