Bobbysocks was a Norwegian pop duo, that won the Eurovision Song Contest 1985 with the song La det svinge ("Let it swing"). The duo was formed in 1983, and consisted of Norwegian Hanne Krogh and Swedish-Norwegian Elisabeth Andreassen. Bobbysocks was disbanded in 1988, however, Hanne and "Bettan" (Andreassen) still appear on stage together. They made a guest appearance at Congratulations, the 50th anniversary Eurovision concert in Copenhagen, Denmark in October 2005. In may 2010 Bobbysocks celebrates their 25 years anniversery and will once again tour together.