By Kurt Jensen There is not one ounce of cynicism in "Song Sung Blue" (Focus), the fact-based tale of a Neil Diamond cover band from Milwaukee. And therein lies immense power. The example set by Mike Sardina (Hugh Jackman) and his wife Claire (Kate Hudson), both of whom struggle with the legacy of a difficult past, is one of unswerving perseverance. Nor are they grimly stoic about their ...