Gallagher, 55, said: "Music has become quite fractured and chart music is dominated by pop. Pop is alright, if the pop stars are cool, sadly the pop stars of today are f***ing idiots."
Asked who he meant he replied: "Sam Smith, just look at him!"
Smith has spoken openly about their fluid gender identity for many years before announcing coming out as non-binary in 2019 and changing their gender pronouns.
They said back in 2017: "I feel just as much woman as I am man."
“I got teased for it. But there were also people respecting me for walking around like that in my school.”
The Unholy singer recently revealed they had been spat at in the street since coming out as non-binary.
They said: “I’m being abused in the street, verbally, more than I ever have. So that was the hardest part, was being at home in the UK and having people shout at me in the street.
“Someone spat at me in the street. It’s crazy.”
The Stay With Me singer said that speaking out about their pronouns had not caused “one negative” in their personal life.
“My family can communicate with me, they always did, but they communicate with me now in an even better way,” they said.
The star went on: “My love life has become better from it, I feel lovable, I feel comfortable in my skin.”