In all seriosity, "Ubu Roi." It's known to many university programs and theatre history classes as "the unstageable play." Let's see Juju Taytay take it on.
Ohhh 2012: The Musical - She could bring the house down every night - literally!!!
Show's I've Seen: 2011: American Idiot, Lombardi, Screwtape Letters, Adams Family, Imaginocean, Phantom - 2010: Spiderman, A Little Night Music, Bloody, Bloody Andrew Jackson, La Cage aux Faux, Next to Normal (twice), Fanny (City Center), Next Fall, - 2009: Finian's Rainbow, Let Me Down Easy, Toxic Avenger, Hair, Mary Stuart, 9 to 5, Avenue Q (a few times), Young Frankenstein, Cry Baby, Applause (City Center), Xanadu, Legally Blond, Glorious Ones, Gutenberg: The Musical, Spring Awakening, Company, Dessa Rose, Jersey Boys, The Color Purple, Taboo, Altar Boys, Lestat, The Weddings Singer, Hairspray, Spamalot, Dirty Rotten Scoundrels, Wicked, Brooklyn, Urinetown, 25th Annual Putnam County Spelling Bee, Grey Gardens, Drowsy Chaperon, Thoroughly Modern Millie, Les Miserable, Aida, Great American Trailer Park Musical, Into The Woods, Naked Boys Singing, Cabaret, Last Five Years, Jekyll & Hyde, Corpus Christi, Side Show, Rent (a few times), Footloose, and Ragtime (First Broadway Show I saw).