The Cleveland Orchestra and Chorus celebrate the holidays with their annual series of Christmas concerts at Severance Hall. You'll find sing-alongs, guest choruses and a "surprise visitor" as the orchestra teams up with the Cleveland Orchestra Children's Chorus, the Cleveland Orchestra Youth Chorus, the Cleveland State University Chorale and the College of Wooster Chorus for these seasonal performances. Tonight's concert begins at 7:30. and concerts continue through Saturday. Consult the website for ticket prices and more information. (Niesel)