Movie star Will Smith performed in front of 80,000 fans in the Luzhniki Stadium in Moscow just moments before the final got underway.
But former Ireland skipper Keane wasn't impressed.
The ITV pundit, 46, was asked whether he enjoyed it and replied: “Not really, no.
“You're always thinking about the players in the dressing room and there's all this nonsense."
Bizarrely Brazil legend Ronaldinho kicked off the closing ceremony by playing the drums while people danced around him.
Smith was joined by American and Kosovar singers Nicky Jam and Era Istrefi.