The Cowboy hitmaker was asked his thoughts on the teen idol during a chat with shock jock Howard Stern on his radio show on Wednesday (19Jun13), and he insisted Bieber's fame will be short-lived.
He said, "Tell me if this is wrong. Justin Bieber... is 100 per cent like watching Vanilla Ice all over again. It's exactly the same. Well, as soon as Bieber has a hit, he'll be like Vanilla Ice.
"The kid's young. He's got some money. He's got the world in his hands. It's just kind of sad to see him go down this trajectory. It's gonna be a very long ride down. We all know the story. I kind of feel for the kid, to be honest with you."
Bieber has hit the headlines for all the wrong reasons in recent months - he was slammed for being two hours late for a concert in London in March (13), and has been involved in a number of clashes with photographers.
Vanilla Ice hit the top of the charts with his single Ice Ice Baby in 1990, but struggled to maintain his success and fell out of the spotlight.