VIDEO: Sasha Allen Takes on Usher's 'Without You' on THE VOICE

On last night's THE VOICE, Sasha Allen wowed the crowd and the judges once again, offering her take on David Guetta and Usher's "Without You." The show kicked off with a powerhouse quartet featuring Allen, Judith Hill, Sarah Simmons and Michelle Chamuel with their take on Rihanna's "Diamonds." Check out both performances below!

The Voice airs Monday and Tuesday at 8 p.m. ET) on NBC.

Sasha Allen has been a backing vocalist for Grammy winners Alicia Keys, Christina Aguilera, John Legend, and pop star Leona Lewis. She portrayed "Dionne" in the Tony Award-winning revival of the hit Broadway show Hair: The American Tribal Love-Rock Musical at the Al Hirschfield Theatre in New York City, and continued with the original American cast to the Gielgud Theatre on the West End in London.

Currently, she is working with acclaimed choreographer and director Bill T. Jones on his new musical, Superfly, produced by renowned record executive Tommy Mottola, the Mottola Group, and the Dodgers.