Jay-Z, "99 Problems"
[Light Year Remix
It's unlikely that Jay will opt for this disco re-structuring of this Black Album classic at his headlining slot at All Points West tonight but, hey, who knows? Remember that one time when My Bloody Valentine played that all-bluegrass set? That was weird.Katy Perry, "Waking Up in Vegas"
[Calvin Harris Remix
OK, so the big problem with this Calvin Harris remix of