Norway was represented by Bobbysocks!, with the song '"La det swinge", at the 1985 Eurovision Song Contest, which took place on 4 May in Gothenburg, Sweden. "La det swinge" was chosen as the Norwegian entry at the Melodi Grand Prix on 30 March, and went on to bring Norway a famous first Eurovision victory after decades of being the butt of jokes about their status as Eurovision's perennial also-rans. It was admitted that the lyrics of "La det swinge" had been written with the specific intention of avoiding those Norwegian consonant combinations which had been said to sound harsh in song to non-Scandinavian ears.

Bobbysocks! were Elisabeth Andreassen and Hanne Krogh, who both had previous Eurovision experience – Krogh as a 15-year-old for Norway in 1971 and Andreassen for Sweden in 1982. Both would make further appearances for Norway, Krogh in 1991 and Andreassen in 1994 and 1996.

The MGP was held at the Château Neuf in Oslo, hosted by Rita Westvik. Ten songs took part in the final, with the winner chosen by voting from five regional juries and a panel of "experts" consisting of Tony Visconti, Anne Marie David, Stikkan Andersson and Ronnie Hazlehurst. One of the other participants was former three-time Norwegian representative Anita Skorgan.

On the night of the final Bobbysocks! performed 13th in the running order, following Italy and preceding the United Kingdom. The voting in 1985 was particularly disparate, with points being spread all across the board to a much greater extent than usual. However at the close of voting "La det swinge" had picked up 123 points, enough for victory by an 18-point margin over runners-up Germany, although the total was and remains the lowest-ever winning score under the 12 points system. "La det swinge" appeared to have sharply divided opinion with the national juries, as it had received an unusually high eight maximum 12 points votes – from Austria, Belgium, Denmark, Germany, Ireland, Israel, Sweden and the United Kingdom – while the remaining ten juries had awarded it only 27 points between them. The Norwegian jury awarded its 12 points to Sweden.

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