I've sung songs with the Christ Church Cathedral Choir in Oxford as I sat in the congregation. I sang along with the "Hallelujah Chorus" at the end of a performance of Handel's Messiah in the Sheldonian Theater. I've sung songs with Matt Redman and Chris Tomlin in the throngs of tens of thousands. But I believe the happiest song I ever sang was in a dirt-floor home in Kiku...