Masshysteri (English: Mass hysteria) was a Swedish Post-Punk band, formed in Umeå in 2008.
[1] The group consisted of Robert Pettersson (rhythm guitar, vocals), Sara Almgren (bass guitar, vocals), Kajsa Bergsten (lead guitar) and Erik Viklund (drums) Robert Pettersson, Erik Viklund and Sara Almgren previously played in the punk band The Vicious.
When The Vicious drummer André Sandström left the band, they had to find a stand-in.
Erik took over the drums and Kajsa Bergsten joined the group on guitar.
According to Dennis Lyxzén (their record company manager), internal problems between band members lead to the group breaking up.