Formed in 1997, LS Jack is a Brazilian rock band. Original lineup: Marcus Menna (vocals), Sérgio Morel (keyboards), Sérgio Ferreira (guitar), Vitor Queiroz (bass), Alessandro Barros (saxophone) and Bicudo (drums). The band ended activities in 2005 due to Marcus Menna’s health problems following an unsuccessful liposuction. In 2020 the band returned with Vinny as the new vocalist.