As millions of YouTube viewers know, the "Hallelujah Chorus" is even hotter than usual this year. The wave started with a flash-mob performance by the Opera Company of Philadelphia and hundreds of local choristers. Dressed as shoppers, they sang the best-known anthem from George F. Handel's "Messiah" oratorio at noon in the downtown Philadelphia Macy's, which was already decked out for the holidays on Oct. 30th. Then came the Nov. 13th performance that sent this viral-video trend into … [Read more...]