The Material Girl hasn't lost her touch: By placing her greatest-hit ballads (''Live to Tell,'' ''Crazy for You,'' ''Take a Bow,'' etc.) in a new context that is, separated from her more attention-getting dance music Madonna reinvigorates them, which is just what a good best-of compilation is supposed to do. The three new songs ''You'll See,'' ''One More Chance,'' and a wonderfully eerie version of Marvin Gaye's ''I Want You'' are consumer enticements that just add to the allure.

