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Over the weekend, Above & Beyond took over Los Angeles' famed Greek Theatre for their revolutionary and much-talked-about, sold-out acoustic show. And the guys had a guest join them on stage for Sunday night's performance - Sonny Moore aka Skrillex! 

Skrillex joined the guys on stage for Above & Beyond's hit "Black Room Boy." 

Check out one fan's video!

Above & Beyond have come together for their acoustic shows, returning to their roots as live musicians. The show consists of mainly Jono on Rhodes piano, Tony on acoustic and electric guitar, vocals, mandolin, and ukulele, and Paavo on piano, cello, and vibraphone. But they don't take the stage alone. The guys are joined by a 13-piece band, and a few vocalists from some of their most well-known songs, Zoe Johnston, Alex Vargas, and Annie Drury.

What a show!

Photos by Rukes