Who's There: Bryan Tanaka & Made-for-TV Christmas Movies?

Chestnuts roasting on an open fire, garbage Lifetime movies playing on TV – it must be nearing Christmas, when all the Whos (and sometimes Thems!) sign on the dotted line to appear in made-for-TV movies. (Someone's gotta pay for all those Hatchimals, am I right?) We figure out exactly how many Christmas movies Lacey Chabert has starred in (SIX!!!!!!!!), who Mariah Carey's new boyfriend is, which harmony in Fifth Harmony is ditching and if that means they are now Fourth Harmony? ...Or no harmony? This is already confusing.