Robert Plant joined Jack White onstage at Lollapalooza Argentina last night. The Led Zeppelin singer emerged during White’s headlining set for a take the classic Zeppelin number “The Lemon Song.” The cover has been in White’s repertoire recently and was also included in the former White Stripes frontman’s now-legendary Bonnaroo headlining set.

Plant previously said in a Facebook chat that he loves White’s “buccaneer spirit, and the way he dodges through the musical horizons. I’d be happy to make a single with him.”

Click here for a video of he performance.