This article is from the ER FAQ, by Rose Cooper email@example.com with numerous contributions by others.
Rosemary Clooney, a prominent cabaret singer from the `40s and
`50s, is George Clooney`s aunt. Rosemary guest-starred on two
episodes of "ER" [103 and 111] as Mrs. Cavanaugh, a.k.a. "Madame X",
a mystery woman with Alzheimer`s who wandered the halls of the
hospital singing. Her character`s name wasn`t revealed until near
the end of her second appearance, when her daughter showed up to
Although her voice has deteriorated somewhat to emphysema,
Rosemary Clooney still enjoys a successful career, singing in concert
halls and recording big band and jazz standards.