“Nel Blu Dipinto Di Blu (Volare)” – Domenico Modugno (Italian – August 18, 1958, For Five Non-Consecutive Weeks)
The Domenico Modugno hit song Nel Blu Dipinto Di Blu was a sensation during the late 1950s. Surprisingly, the Italian song reached the top of the Billboard Hot 100 during its year of inception. Also known as Volare, the song was the first Italian track to make it into Eurovision, a hugely popular music competition at the time.
Source: Amazon.com
In addition to making rounds in Italy and the US, the song also became immensely popular all over the world. It even went on to win the inaugural Grammy for Song of the Year, and to date, remains the only song to do so.