The "Thank U, Next" star made the remarks during an interview with Vogue magazine last year, when she said, "It was frivolous and fun and insane and highly unrealistic."
And while Pete's fans were unsure whether or not he'd reference the failed engagement in his new Netflix stand-up special "Alive From New York", the funnyman said during the show that the Vogue interview made him realise he was fine to make quips about his former relationship.
"She has her songs and stuff and this is what I have," he laughed. "You're like, 'Pete, this isn't fair. You're airing out dirty laundry. How could you do that?' "
"'Where did she say this stuff? To her friends in the confidence of her own home?' No, she said it on the cover of Vogue magazine. Can you imagine if I did that? My career would be over tomorrow if I spray painted myself brown and hopped on the cover of Vogue magazine and just started s***ting on my ex."
"Can you imagine if I did that s**t? Like, 'Yeah, I was just f**king her because I was bored and then Fortnite came out.' "
He continued, "I wasn’t going to do jokes about this, but then my buddy told me, he's like, 'Yo, I recently heard that Ariana said she had no idea who you were and she just dated you as a distraction.' So now I just think it's like fair game."
"She won Billboard's Woman of the Year, and I got called 'butthole eyes' by barstoolsports.com."