"Fairytale" is a 2009 song written and composed by Norwegian violinist/singer Alexander Rybak, and the first single from Rybak's debut album Fairytales. This song was the winner of the 2009 Eurovision Song Contest in Moscow, Russia.

The song was elected through the Norwegian festival Melodi Grand Prix 2009 on 21 February, winning in the biggest landslide of the contest's history, and competed against eighteen other Eurovision entries in the second semi-final on 14 May 2009, where it qualified for the final. The final took place on May 16, and the song won with 387 points – a new ESC record. It was Norway's third Eurovision Song Contest win.

The backing dancers for the Eurovision performance, Sigbjørn Rua, Torkjell Lunde Børsheim and Hallgrim Hansegård, are from the Norwegian dance company Frikar, performing the folk dance halling. The backing singers, Jorunn Hauge and Karianne Kjærnes, wore long pink dresses designed by Norwegian designer Leila Hafzi.

Norwegian media reported that "Fairytale" is about Rybak's ex-girlfriend Ingrid Berg Mehus whom he got to know through the Barratt Due Institute of Music in Oslo.

The song debuted on the Billboard Greek Singles Chart at number 1, one week before the contest. The song also debuted on the Norwegian Singles Chart on the week of 11 February, 2009 at number 3, before rising to number one on the following week, the week of the Melodi Grand Prix final. This was the first time that the Melodi Grand Prix winner reached number 1 before winning the contest. The song remained at number 1 for 8 consecutive weeks. The song has since entered the Swedish Sverigetopplistan, debuting at number 47, before rising to number 7 in its third week, the week of Eurovision - eventually reaching the top spot. After the Song gaining the Top Spot on Eurovision, it entered the Top Ten of many Download Charts across Europe, and also the No. 1 position in many Countries. The song debuted on the UK charts at #10 on Downloads Alone, and reached Number 9 on the Download Chart. "Fairytale" is the ninth non-UK Eurovision entry to reach the top ten in the UK charts since the contest began in 1956, most recently Johnny Logan reached #2 representing Ireland in 1987.