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I came across this one, and while it's either 5 months too late or 7 months too early, it still made me chuckle...
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Christmas Carols For the Psycho Challenged

SCHIZOPHRENIA: Do You Hear What I Hear?

DEMENTIA: I Think I'll Be Home For Christmas

MANIC: Deck the Halls and Walls and House and Lawn and Streets and Stores and Office and Town and Cars and Busses and Trucks and Trees and Fire Hydrants and...

PARANOID: Santa Claus Is Coming To Get Me

PERSONALITY DISORDER: You Better Watch Out, I'm Gonna Cry, I'm Gonna Pout, Maybe I'll Tell You Why

OBSESSIVE-COMPULSIVE DISORDER: Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell Rock, Jingle Bell, Jingle Bell, Jingle Bell, Jingle Bell Rock... (better start again)

PASSIVE-AGGRESSIVE PERSONALITY: On The First Day of Christmas My True Love Gave To Me (and then took it all away)

BORDERLINE PERSONALITY DISORDER: Thoughts of Roasting on an Open Fire.