Angels - a song that's played at weddings, funerals and is still a top karaoke tune in pubs across the country after 20 years.
The track, which was released as a single in December 1997, is Robbie's biggest selling single.
However, the former Take That star is retiring Angels because singing it has become too hard for him - not that he can't hit the high notes, it's because the song is so emotional.
Robbie told the Daily Star: "I have to hold myself together or I could cry at everything and look pathetic. There are people who put posters up before Angels about their mum or dad who died and I think ‘Oh God, I am going to cry’. It did affect me."
At least he's still referring to the track online going by this cracking joke!
— Robbie Williams (@robbiewilliams) January 13, 2018
Cover image and images on Facebook and Twitter via @robbiewilliams on Instagram