Since the mid-2000s, songwriter Luke Laird has been putting his stamp on tunes that touch on tradition and modernism, sometimes within the same song. Freewheeling, outlaw-tinged tracks like Jake Owen’s “Down to the Honkytonk” show Laird’s old-school side. And Little Big Town’s smash “Pontoon” has to be the bluesiest deep-grooving cut ever to include lyrics about Astroturf and koozies (OK, it’s the only one).