I have an infatuation with cards printed on plastic. In fact, this is only my sixth TCIC feature and yet it's the second featured card set made from acetate. (Here's the first.)
This is not the first card to follow a music theme. Leaf released a CD-inspired Frank Thomas Greatest Hits set in the 1990s, and baseball cards that were actual playable records were released in the 1980s (and probably before).
If someone were to revisit this set today, who would be in it, and what would their two songs be? I think Tim Lincecum, were he in the set, could have the hits "Light My Fire" (Giants fans will get the double reference - if you know both reasons why I picked this song comment below) and "Freak Out".