LAB Art, the largest street art gallery in the nation, presents XVALA, whose celebrity chimp  sticker art you may have spotted around town, and whose introduction of the Beiberbot, a robot made form a metal trash can liberated form Justin Beiber, we covered over the summer.  XVALA’s art challenges preconceived notion of privacy in the real and virtual world. Past works incorporate trash left on the curb by famous folk. Whether you “fear Google” or not, expect an eye-opener from “The Tonight Show.”