For An American in Paris, Robert Fairchild had to master the art of singing and dancing simulltaneously. PC Angela Sterling, Courtesy Boneau/Bryan-Brown
At the end of Act I in Broadway's Mean Girls, the entire ensemble performs high-energy choreography while belting what Kamille Upshaw says is "a million notes at once." Though Upshaw is a Juilliard-trained dancer who made her Broadway debut in Hamilton, nothing, she says, could prepare her for this moment. "Singing while dancing is just hard," Upshaw says. "It takes patience, focus and compromise."