Michael Schneider Variety Editor at LargeSPOILER ALERT: Do not read ahead if you have not watched Season 5 Episode 11 of “The Masked Singer,” which aired May 12 on Fox.Hanson has been mmm-bop’ed off “The Masked Singer.” The pop star brothers were unmasked on Wednesday’s episode as the Russian Dolls.The trio became the first group to compete on the show; last season, the couple Clint Black and Lisa Hartman performed as a duo under the Snow Owls costume.