Billy Joel's only #1 single in the UK was his song "Uptown Girl". This was the song written and performed by the American musician Billy Joel. It was released at the end of September 1983, on his ninth studio album "An Innocent Man" (1983). The lyrics concerning "Uptown Girl" describe a working-class "downtown man" attempting to woo a wealthy "uptown girl".

Billy Joel stated that “Uptown Girl” was inspired by his then girlfriend, Elle Macpherson. But after they split up, Joel included ideas for lyrics in the song from his future wife supermodel Christie Brinkley. Brinkley and Joel remained married for nine years. She was the person who drew the cover art for his 1993 album "River of Dreams". They eventually separated due to Joel's busy work schedule.

This song was Joel's only #1 single in the UK in 1983. It was #1 in the UK for five weeks and was the second highest selling single for that year, right behind Culture Club’s “Karma Chameleon”. It was also one of Joel's best selling in the US. This is one of the song that truly helped to make Joel a musical icon worldwide.

More Info: en.wikipedia.org