Renowned musician Natalie MacMaster began playing the fiddle at age 9 and has performed with big-time acts such as the Chieftains, Faith Hill, and Yo-Yo Ma, with whom she recorded an album of Christmas songs. She comes to Severance Hall tonight at 7:30 p.m. to play Celtic medleys, Nova Scotian jigs, and holiday tunes with accompaniment from the Cleveland Orchestra in a program dubbed Christmas in Cape Breton. Tickets start at $35. (Niesel)