SHANIA TWAIN: Greatest Hits **1/2 (Mercury). There's no denying the radio appeal of Shania's slick country, but the formula wears thin over 21 tracks. The not-so-secret weapon is producer/co-writer Mutt Lange (Shania's hubbie), who possesses the perfect recipe for ear candy. There are three new songs (two versions of Party for Two), but the pinnacle remains the platinum picks from Come On Over.

JEFF CRAWFORD