It’s just like Charles Dickens’ “A Christmas Carol,” except that in this version, singer-songwriter Aimee Mann is forced to rediscover the true meaning of a Christmas concert tour after she demands her band play a Dec. 25 gig sponsored by Activia yogurt. (“Nobody buys CDs anymore; you’ve got to attach yourself to a sponsor,” she reasons.) Oh, also, the Ghost of Christmas Past communicates with Mann via Skype and (to save on budget) helps her rediscover her joy by sending her YouTube links to old concert footage. But let me not give it all away (except to say that John Krasinski, Michael Cera, and John C. Reilly are all involved). Check out part 1 embedded here, then head over to YouTube to see parts 2, 3 and 4.