Schizophrenia: Do You Hear What I Hear?

Multiple Personality: We Three Queens Disoriented Are.

Narcissism: Hark! The Herald Angels Sing About Me!

Dementia: I Think I'll Be Home for Christmas.

Paranoia: Santa Claus is Coming to Town to Get Me.

Mania: Deck the Halls and Walls and House and Lawn and Streets and Stores and Office and Town.