Big Bad Voodoo Daddy is a contemporary swing band from southern California. For the "Phineas and Ferb Christmas Vacation!" special, they sang the song "Christmas is Starting Now". Some of their popular songs include "Go Daddy-O", "You & Me & the Bottle Makes 3 Tonight (Baby)", and "Mr. Pinstripe Suit". The swing band played the Superbowl XXXIII half-time show in 1999.