Langdon and his bandmates and Lennon will perform at the pay-per-view webcast to benefit the David Lynch Foundation's First Responders Initiative.
The rocker and Tyler, who are devotees of the foundation's Transcendental Meditation techniques, will perform an original song, titled You Can't Go Home Again as part of the show.
Langdon says, "We are beyond thrilled to be performing a benefit for the great David Lynch's Foundation and the First Responders Initiative. I thank the very special performers Liv Tyler, Sean Lennon, Charlotte Kemp Muhl and of course the members of Spacehog. We all share a belief in peace and transformation and share our performance with our fans on behalf of these incredibly brave men and women."
Filmmaker and meditation guru David Lynch, whose charity will pick up proceeds from the rooftop gig, adds, "I'm so happy that Royston, Spacehog, Sean, Charlotte, and Liv are beaming their sounds to your computer! It's such a beautiful thing to share the power of music."