Meh. I can never pick a favorite anything, can I? Notoriously indecisive and whatnot...But I digress. My top-of-head list:
"At the End of the Day" - Les Miserables
"Phantom of the Opera" - Phantom of the Opera
"Sunset Boulevard" - Sunset Boulevard
"Once and for All" - Newsies
"In the Flesh?" - The Wall
"Run Like Hell" - The Wall
"La Court des Miracles" - Le Notre Dame de Paris
"Bohemiene" - Le Notre Dame de Paris
"Belle" - Le Notre Dame de Paris
"Tu as me Detruire" - Le Notre Dame de Paris
"Moonlight Sonata" - The Magic Flute
"Intentions" - Hero!
"Kill the Hero" - Hero!
"Raised in Harlem" - Hero!
"Leave Here" - Hero!
"Fire of Love" - Hero!
"Peron's Latest Flame" - Evita
"Dentist!" - Little Shop of Horrors
"76 Trombones" - The Music Man
"Just You Wait, Henry Higgins" - My Fair Lady
"Thoroughly Modern Millie" - Thoroughly Modern Millie