The live results show of "America's Got Talent," which features a variety of talent competing for a $1 million prize, will air on NBC from 8-10 PM ET. The cast of Once will perform the Academy Award-winning song "Falling Slowly." Also scheduled to perform is UK recording artist Cher Lloyd.

The cast of Once features Tony Award winner Steve Kazee (110 in the Shade, Spamalot) as Guy and Cristin Milioti (Off-Broadway's That Face, Stunning, The Heart Is a Lonely Hunter) as Girl. Also in the troupe are David Abeles, Will Connolly, Elizabeth A. Davis, David Patrick Kelly, Anne L. Nathan, Lucas Papaelias, Ripley Sobo, Andy Taylor, Mckayla Twiggs, Erikka Walsh, Paul Whitty and J. Michael Zygo.

Once is the winner of eight 2012 Tony Awards, including Best Musical. The new musical opened March 18, following previews that began Feb. 28, at Broadway's Bernard B. Jacobs Theatre.

Here's how the producers characterize the musical: "[Once] tells the story of an Irish musician and a Czech immigrant drawn together by their shared love of music. Over the course of one fateful week, their unexpected friendship and collaboration evolves into a powerful but complicated romance, heightened by the raw emotion of the songs they create together. Brought to the stage by an award-winning team of visionary artists and featuring an ensemble cast of gifted actor/musicians, Once is a musical celebration of life and love: thrilling in its originality, daring in its honesty... and unforgettable in every way."

For more information, visit OnceMusical.com.