‘Santa Claus Is Coming To Town” is played with blaring speed. “O ­Christmas Tree” is sung as a proud first solo.

The fourth holiday CD by the Plummer Home For Boys in Salem is a mash-up of Christmas carols, original songs, and a ­poem written and performed by a dozen teenage musicians who live at the group home on ­Salem Harbor or who take part in OnPoint, an outreach program for at-risk youth.