Thanks to Louie for this one as well!

Schizophrenia

Do You Hear What I Hear?

Multiple Personality Disorder

I’m Three Kings – Disoriented Am I

Dementia

I Think I'll be Home for Christmas

Narcissistic Disorder

Hark the Herald Angels Sing About Me

Hypermania

Deck the Halls and Walls and Doors and Floors and House and Lawn and Streets and Stores and Office and Town and Cars and Buses and Trucks and Trees and.....

Paranoia

Santa Claus is Coming to Town to Get Me

Borderline Personality Disorder

Thoughts of Roasting on an Open Fire

Personality Disorder

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

Attention Deficit Disorder

Silent night…Holy…oooh, look at the froggy…
… can I have a chocolate?…
… why is France so far away?

Obsessive Compulsive Disorder

Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells, Jingle Bells.

Merry Christmas to you and your neuroses, no matter how pathological!