The CBSO's star conductor says singing with others "makes your blood circulate better".Read more
BBC music reporter
Christopher Goldscheider's solicitor says the orchestra arrangement contributed to his hearing damage.
The Lord Bless You and Keep You is a setting of a biblical benediction from the Book of Numbers, composed by John Rutter in 1981.
The Fairy Tree was written by Mary Isabel Leslie in the early 1900s about a Hawthorn tree in the village of Clogheen in County Tipperary.
The 19th Century Spanish Christmas carol, A La Nanita Nana, is sung as a lullaby to the baby Jesus on Christmas day.
The musicians in the Chicago Symphony Orchestra go on strike over pay and pensions.