Well. Who hasn't heard of CATS, FOOTLOOSE, CABARET, ANNIE, CAROUSEL, CHICAGO, EVITA, FAME, GREASE, HAIR, OLIVER, FUNNY GIRL, DAMN YANKEES, ANYTHING GOES, SHOWBOAT, SOUTH PACIFIC, or SWEET CHARITY?
I would say that she's probably heard of all of those musicals. Plus, a short name would lead one to believe that it's one word - one short word.
I would rule out the following immediately:
Follies
Chess
Swing
Assassins
Company
Dreamgirls
Falsettos
Ragtime
1776
My money would be on:
Camelot
Aida
Honk
Mame
Pippin
Titanic
Seussical
"If you are going to do something, do it well. And leave something witchy."
-Charlie Manson