It’s a given: birthdays are something to sing about. But a 150th birthday calls for pulling out all the stops, such as beating a drum, tooting horns, and clashing cymbals. How about singing with a live band? All that and more occurs when the London Concert Band celebrates Canada’s Sesquicentennial. “Most likely, many of the 36 million of us plan to do something special on the big day,” says conductor, Robert Kennedy.