Phantom of the Opera (POTO): it goes from so low to so high, somtimes I feel like I'm straining.
Buddy's Blues (Follies): Diction DICTION DICTION!
Lost in the Wilderness (Children of Eden): again, goes kinda low to extremely high.
and
Fifty Million Years Ago (Celebration): OMG that song go so high! Also the notes you sing in it are so different from the accompinament that you don't know whether your flat or on.
"Sing the words, Patti!!!!" Stephen Sondheim to Patti LuPone.