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The lowest metallicity massive stars in the Local Universe withZ~(Zo/50-Zo/30) are the crucial objects to test the validity of assumptions inthe modern models of very low-metallicity massive star evolution. These models,in turn, have major implications for our understanding of galaxy and massivestar formation in the early epochs. DDO68-V1 in a void galaxy DDO68 is a uniqueextremely metal-poor massive star. Discovered by us in 2008 in the HII regionKnot3 with Z = Zo/35 [12+log(O/H)=7.14], DDO68-V1 was identified as an LBVstar. We present here the LBV lightcurve in V band, combining own new data andthe last archive and/or literature data on the light of Knot3 over the 30years. We find that during the years 2008-2011 the LBV have experienced a veryrare event of `giant eruption' with V-band amplitude of 4.5 mag (V~24.5-20mag).

DDO68-V1: an extremely metal-poor LBV in a void galaxy