You probably know that Mrs. LENNDEVOURS is music teacher and choral director. But what you might not know is that she is also classically trained mezzo-soprano who has performed with several groups here on Long Island and in upstate New York. Not enough people get to hear her sing, so it’s fun that the group she sings with (or did pre-Jackson anyway), the Stony Brook University Camerata Singers, is releasing a new CD at the end of the month. They worked very hard and spent many hours in the studio putting it together. I’ve heard at least half of the…