Inger Barron, left, sings Christmas Carols with other members of the Boulder Chorale on Sunday. Santa Claus flipped  the switch that lit up the Pearl
Inger Barron, left, sings Christmas Carols with other members of the Boulder Chorale on Sunday. Santa Claus flipped the switch that lit up the Pearl Street Mall and Boulder County Courthouse, as well as the star on Flagstaff Mountain. ( CLIFF GRASSMICK )