Last night at Kanye West’s Glow in the Dark concert stop at Madison Square Garden, Jay-Z made a not so surprising appearance, and dropped a very surprising sneak preview of his forthcoming diamond album, Blueprint 3. Yeah, diamond is a prediction.

I’ll let the MTV intern, who had a fifth row seat, set the scene..

“It seemed like each performance throughout the show topped the next. During the encore, after Lupe came out to perform a hot version of “Touch the Sky” with Kanye, I didn’t think the show could get any better. I thought wrong! Kanye West spoke about writing all his songs with one person in mind — and then, ladies and gentleman, brought out Jay-Z, and he and Kanye performed a song from Jay’s forthcoming Blueprint 3 LP.”

Jay-Z “Jockin Jay-Z”

“The crowd was wild, they killed the performance, and the bass is still ringing in my ears as I write this.”

Safe to say.. Jay-Z’s back to fighting shape.