Because the choir events typically sell out, there will be two dates for their holiday concert. Silver Sound, Silver Streak, will perform on Dec. 14 and 15.This is the first concert of the year where the students will be wearing costumes, but there are other new elements as well. Choir teacher Jennifer Vrabec says that there will be a surprise ending to the concert.“The main thing is that it involves all of the kids, and it’s just different. It’s something that we haven’t done before,” she said.Tickets will go on sale the week before the concert, and will be priced at $3 for students and senior citizens. The price for adults will be $5.