On January 30 the unthinkable happened to St. Louis radio: The long-time classic-rock station KIHT (96.3 FM) switched formats. Instead of the brothers Doobie and their ilk, that spot on the dial now cranks out "All the Hits," which to us sounds an awful lot like Meghan Trainor's "Lips Are Movin'" on a near constant loop. And we were blue. But then in April, fiery-haired savior — and all-time St. Louis favorite — Sammy Hagar swooped in and gave us a kick-ass happy-hour soundtrack for Sunday evenings with his Top Rock Countdown. From 4 to 6 p.m. each week, Hagar picks a theme, such as "Sammy's Favorite Songs with One-Word Titles." This recent playlist included the Stones' "Shattered." Soundgarden's "Spoonman." David Bowie's "Fame." (And of course his own "Dreams" and "Red.") All twenty or so songs are reliably choice and interspersed with anecdotes and pearls of wisdom from the Red Rocker. Just try to listen for an hour without cracking a beer; it's damn near impossible. And Hagar wouldn't want it any other way.