A good song by deadmau5 is Seeya Next Tuesday.
ITT: We see how music-related threads degenerate into recommendation threads.
My favorite song is probably either http://www.youtube.com/watch?v=fVGEumVLBuo&ob=av2e . Cthulhu Sleeps and Bad Selection.
Yeah both of those are awesome too.
Edit: Another really awesome song is Professional Griefers. THAT SONG IS AWESOME!
Who else likes deadmau5? 
I like dead mice.
Another one of my favorites is Catbread. He used a door stop for it.
That’s actually what my dirty bass song was based off of.
Limit Break is cool too. Oh and, does anybody know when the next album comes out?
EDIT: Where Are My Keys is probably my favorite song by the mau5.
SHUT UP BOT!