Do all you youngsters dig the deadmau5 guy? While not really my cup of tea, I at least found the electronica segment (once the Foo Fighters stopped playing) somewhat interesting, if alien.
I liked it, too, but I had no real idea who he was, or what the song was, or what. I had to do some Googling afterward to explain WTH I just saw. I searched for terms like "Grammys mouse mask" -- god, I felt so old!
Turns out deadmau5 was up for a Grammy for remix of a Foo Fighters song, which I presume THEY played first, then he mixed right afterward. You saw Dave Grohl dancing to the mix?
P.S. Deadmau5 lost to Skrillex. (Wow, Did you EVER think you would see anything REMOTE approaching THAT sentence back when you were partying with PigPen in the good ol' days?)