Justin's fan snub came after Adele defended him when he was booed at her recent concert in Sydney.
Speaking during her gig at the ANZ Stadium, Adele, 28, asked concertgoers if they planned to attend Justin's upcoming show at the same stadium later this month, but her question was greeted by boos from her fans.
However, she quickly rushed to defend the star, saying: "If you started out at 12, you'd be like that too, okay!"
Justin has been a controversial figure since shooting to fame with his single Baby in 2010 and has had a number of issues with the law, paparazzi and fans.
Last year, Justin explained that he would no longer agree to take selfies with fans because he was sick of being treated like a "zoo animal".
He wrote on Instagram: "If you happen to see me out somewhere know that I'm not gonna take a picture I'm done taking pictures. It has gotten to the point that people won't even say hi to me or recognize me as a human, I feel like a zoo animal, and I wanna be able to keep my sanity. I realize people will be disappointed but I don't owe anybody a picture."
"People who say 'but I bought ur album' know that you got my album and you got what you paid for AN ALBUM! It doesn't say in fine print whenever you see me you also get a photo (sic)."