Brian Johnson of AC/DC turned 67 today.  There's only ONE guy who could have possibly pulled off replacing Bon Scott ...  Brian Johnson!  That's it .... Nobody else could have done it, and when he can't do it anymore, I hope they retire instead of trying to replace him.  I don't think it can be done.   And it's also nothing short of amazing that their first album after Bon Scott is like the 2nd or 3rd best selling album of all time... "Back in Black" ... yeah, he was made for the gig!   So I salute you today AC/DC fans!