The former Oasis star only discovered that The Royle Family star had died just hours before he took to the stage in Nashville and sang a moving version of his 1994 hit, which became the BBC sitcom’s theme tune, in her memory.
He told the crowd at the Ryman Auditorium: “I want to dedicate the next song to 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 sitcom in England called The Royle Family.”
He finished by adding, “So, wherever you are,” and pointing heavenward, before launching into the song.
The 49-year-old, who is touring with his band Noel Gallagher’s High Flying Birds, had promised the tribute earlier on Instagram.
He shared a picture of Aherne with the caption, “RIP Kaz ... I shall sing for you tonight. (My god you made us laugh!)”
Aherne starred as Denise Best in The Royle Family, a sitcom that centred around a working class family sitting in their living room and which was the toast of the 1999 British Comedy Awards, scooping four trophies including best actress for Aherne.
It also went on to take home the best sitcom Bafta in 2000 and 2007.
Her brother has said his “heart is broken” following the comedian and actress’ death.
In a statement made to the Daily Mirror, her brother Patrick said: “My heart is broken as I loved her so much. But she is now in a better place and most of all she has no pain.
“I have lost a beautiful sister and the world has lost an amazing talent.”
An unnamed relative also told the paper that the family “didn’t expect her to go” and that she had “died on her own”.