Rappers and rockers team up all the time. Heck, Jay-Z and Linkin Park teamed up for 'Collision Course', which was a CD/DVD of mash-ups of their biggest hits.

However, I never thought I'd see the day that Pearl Jam and Jay-Z shared the same stage while jamming out to (probably) Jay-Z's biggest hit '99 Problems'. But, that's what happened in Philadelphia as Pearl Jam closed out the 'Made in America Festival'.

I've found a ton of these videos floating around on Youtube, but this one seems to be the least distorted.

I have to admit, this is pretty dang cool.