Poor, poor Kourt.
Now, reports are coming out that Disick knows what he's doing, and how to make it better. What remains though, is whether he can actually do that.
The source says of Disick:
Justin took the stage with some of his hits, including Baby, as well as some tracks off his latest album, Believe!!
Check out JB (above) with his acoustic serenade of Fall!
Aww… wonder if he was singing it to Selenita!
Bieber also got the crowd pumped up with his fancy footwork, when he took on All Around The World!