Empty Room - Arcade FireFlickr.
I'll give you a rundown of some the music as well:
The Black Keys were just plain sexy
Lady GaGa was disturbing
Gogol Bordello was fantastically danceable
Stars made me feel in love
Wolfmother made me feel hardcore
And Arcade Fire made me overwhelmed with the glory of what it means to be alive, for all of us.
It was simply wonderful.