Performers go head-to-head in this week's back-to-back listener requests! First up, Liza Minnelli and Alan Cumming perform a cheeky, maybe-subversive rendition of "Baby It's Cold Outside" - then Cyndi Lauper joins The Hives for "A Christmas Duel", a surprisingly spectacular song about spouses tearing their marriage to shreds. Thanks to Stuart and anonymous for these requests!