Not quite sure what the point is! He's certainly much more deserving of a top 500 artist ranking than 50 Cent, who somehow has pulled the wool over enough critics' eyes to garner acclaim for his moribund attempts at "musical" expression.
I got the 420 reference. I don't get Bing Crosby, though. Was he a stoner? (Hard to imagine, what with how he treated his family and everything.) Is there some arcane "Bong Crosby" pun I don't know about?
Apropos of nothing except our potentially dirty minds, the four-character Forum posting code that popped up here is "XCUM" - with a conspicuous space in the black box after the X. NSFW!!!