"L'estate sta finendo" is a song by the Italian Italo disco duo Righeira that was released as a non-album single in May 1985.

[4] On the Swiss Singles Chart, "L'estate sta finendo" debuted at number 23 in the issue dated 1 September 1985.

Righi performed the song for a concert in the city a few years later, this song was picked up afterwards by the ultras of the city's football club L'Aquila Calcio 1927 called the Red-Blue Eagles, who used it as a chant that starts with the line "Un giorno all'improvviso" (one sudden day).

Jamie Webster, who heard the chant during Liverpool's match against Porto, then sang and recorded a version.

It became popular during Liverpool's 2017–18 UEFA Champions League campaign, especially after a win against Manchester City in the quarter final.