Here's a few songs with snake references, just off the top of my head. I'm probably giving a clue as to my age here lol!
BTW I listen more to rock than anything else so if there's country or rap ones I can't help much!
"Crawling King Snake" the Doors
"Baby Snakes" Frank Zappa (lol)
"Sin City" (?), AC/DC "ladders and snakes... ladders give, and snakes take..."
"Voodoo" by- um, Smash mouth? or is it Smack mouth? "I'm not the one that's so far away, when I feel the snake bite into my vein..."
I think there's a Metallica one, can't remember which one though