The song was used as the theme tune for Aherne's popular sitcom "The Royle Family," reported Digital Spy.
"The following song is for a friend of mine who died this afternoon. Her name was Caroline and she was a very, very, very funny woman.
"She used this next song on a very, very, very, very brilliant sit-com in England called 'The Royle Family'," Gallagher told the crowd.
The musician pointed up to the sky and added, "To wherever you are.