In 1957, West Side Story premiered on Broadway with Chita Rivera turning heads as the sassy Anita. The movie version four years later recast the role, giving it to Rita Moreno, who would go on to win an Oscar for best supporting actress. Decades later, a feud erupted between the two women. Well, not really. Forbidden Broadway creator Gerard Alessandrini imagined the faux catfight for his show. In a number, two actresses in identical costumes perform a satirical version of Anita’s big song, “America.” “I am a versatile actress,” sings Rita. “As long as you stay on the mattress,” Chita fires back. Rowr.

Forbidden‘s first revue opened in 1982, spoofing Annie, Evita, and Ethel Merman. Since then, the show has been retooled again and again to keep up with Broadway trends like Beauty and the Beast and Mamma Mia! and revivals like Gypsy and South Pacific. The show’s last incarnation closed in early 2009.

Greatest Hits collects some classic numbers, along with newer fare from Hairspray (“You Can’t Stop the Hype”) and Wicked (“Defying Subtlety”).

Greatest Hits is a fast-paced show, with the six actors rolling through five or six roles apiece. The uninitiated might not be able to follow every line, Burns warns. “That’s the only tiny drawback — if someone doesn’t know all of the songs,” she says.