Harmonix is extremely pleased that it nailed the different looks of the Beatles in The Beatles: Rock Band, straight down to the facial hair from different eras. Yes, that includes Big Beard Paul McCartney above. Harmonix community manager John Drake told us, "We're really proud of all the mustache content we have in our game. However, there will be no mustache DLC in the game. Confirmed. You heard it right here."
So, if you're hoping for some kooky Salvador Dali-esque facial hair creations to come to the game at a later date, we're sorry. However, the game freaking rocks. We wouldn't even care if they featured in-game ads for the Gillette Gamer Razor in it at this point.