Unstoppable

THE OAK RIDGE BOYS Unstoppable (RCA) Like the Beach Boys, the Oaks have a few too many crow's-feet to be called ''boys'' anymore. But that should be the least of their worries. Always one of the tamest vocal groups in country-they came out of tame white gospel, after all-they've now sunk to new levels of homogenization. When the songs on their new album aren't total bland-outs, they're dorky novelty tunes, such as ''Baby on Board'' (the romantic kind, not somebody's infant) and ''Love This Cat,'' a failed attempt at rockabilly replete with a kitten's meow at the end. Like that polyester leisure suit in the back of your closet, the Oaks seem impossibly quaint and old-fashioned these days. Of course, they see themselves differently. In ''When It Comes to You'' they sing: ''I'm a little bit wild/A little bit crazy.'' In your dreams, boys, in your dreams. C -AN