Herreys, sometimes Herrey's or Herrey, is a Swedish pop group, consisting of the three brothers Per Herrey, Richard Herrey, and Louis Herrey. They won the Eurovision Song Contest 1984 with the song "Diggi-Loo Diggi-Ley". Richard and Louis Herrey became the first teenage males to win Eurovision and remain the youngest-ever male winners, being 19 years and 260 days and 17 years and 184 days of age, respectively. In 1985, they won the Sopot International Song Festival with "Sommarparty". At the time of their Eurovision win, the brothers were living and working as singers in Cleveland, Ohio, United States. Herreys continued to record and tour for a few years, but had no hits of the same magnitude as the Eurovision winner. They were the first European boyband preceding the international boom a few years later. Herreys was the bestselling pop group in Sweden in the 1980s, and enjoyed enormous success touring and performing in excess of 300 live shows.

The Eurovision Song Contest 1984 was the 29th edition of the Eurovision Song Contest, held on 5 May 1984 in the Théâtre Municipal in Luxembourg City, Luxembourg. Organised by the European Broadcasting Union (EBU) and host broadcaster Radio Télévision Luxembourg (RTL), the contest was held in Luxembourg following the country's victory at the 1983 contest with the song "Si la vie est cadeau" by Corinne Hermès. The event was presented by Désirée Nosbusch, who, at 19 years old, remains the youngest person to have hosted the contest as of 2024.