In an interview with UK's Esquire, the 28-year-old singer, expressed her dislike over the people in the industry.
"I feel like when I was growing up and dreaming of being a pop star, it was the days of Britpop when things felt authentic and anarchic, and people were taking drugs and having a lot of fun and it wasn't fake, it was real," Allen said.
"So excuse me if I found it a bit disappointing when I arrived and it was a bunch of sterile botoxed idiots that stank of desperation," she added.
"I thought the people in that showbiz circle were my friends. But almost the second I got pregnant and I wasn't able to go out and party, they were suddenly quite nasty," she said.
"There's a way that those people survive, and it's not by being nice. The way they make themselves feel powerful is to ostracise other people," she added.