The Canadian singer and his ex, Selena Gomez, spent last weekend trading insults on the photo and video sharing app.
It all started after Justin Bieber posted a series of photos of him and his new girlfriend, Sofia Richie, who is the daughter of Lionel Richie.
After getting abuse from some fans, he threatened to make his Instagram account private.
"I'm gonna make my Instagram private if you guys don't stop the hate this is getting out of hand," he wrote on the final picture that he posted.
"If you guys are really fans you wouldn't be so mean to people that I like."
But it appears Justin Bieber's gone one step further than making his account private.
This is what you see when you search for Justin Bieber's account now, so it's either deleted or suspended.
Justin Bieber had nearly 78 million followers on Instagram.