Skrillex's Grammy Performance With Justin Bieber Took Him Back To His Rock Roots

Skrillex on guitar = yaaaaaas ??

Skrillex had a stellar night at the 58th Annual Grammy Awards.

Along with Diplo and Justin Bieber, Skrillex won Best Dance Recording for "Where Are Ü Now" and Best Dance/Electronic Album for Skrillex And Diplo Present Jack Ü.

After the epic wins, Skrillex hit the stage shredding guitar with Bieber -- a performance that took his OG fans way back.

Yup, Skrillex (also known as Sonny Moore) fronted screamo band From First To Last from 2004-2007, so his jump from behind the turntables isn't really so unusual.

Fans reminisced right away:

See for yourself -- check out this video from 2004: