Second Act Opening Show-Stoppers

I'm trying to think of what shows open their second acts with a show-
stopping number.  I know what one would consider to be a "show-
stopper" is a subjective judgment, but I would not consider something
like "I Feel Pretty" from WEST SIDE STORY to be among them, much as
it's a fine and famous song from the show (Sondheim's reservations
about his lyrics notwithstanding).  "Don't Cry For Me, Argentina"
perhaps?  Not sure about that one.  It's certainly the most famous
song from the show, but even so -- I can't quite think of it as a show-
stopper either (I'm most familiar with the original album that the
show is based on, and "Argentina" always sounded to me like the end of
Act I, with "High Flying, Adored" as the Act II opener, though I know
that's not how the show breaks it up).  Here's some that I do think
qualify as show-stoppers:

"Hey There, Good Times" -- I LOVE MY WIFE
"Too Darn Hot" -- KISS ME, KATE
"Side By Side By Side" -- COMPANY
"It's an Art" -- WORKING
"Please Hello" -- PACIFIC OVERTURES
"Steam Heat" -- THE PAJAMA GAME